Asteraceae GH: 01925830 Vernonia gigantea (Walter) Branner & Coville USA: Ohio 3 mi. w. of Bellefontaine F. W. Pennell 16037 1931-9-13
Boraginaceae GH: 02025914 Cryptantha sp. USA: Nebraska along Dismal River 15 mi. south of Thedford F. W. Pennell 15068 1931-6-10
Fabaceae GH: 02136340 Strophostyles leiosperma (Torrey & A. Gray) Piper USA: Nebraska S. W. of Columbus F. W. Pennell 16021 1931-9-5
Orobanchaceae GH: 02033534 Castilleja angustifolia (Nuttall) G. Don USA: Idaho 5200-5300', 5 miles n.w. of Howe F. W. Pennell 15191 1931-6-20
GH: 02033533 Castilleja angustifolia (Nuttall) G. Don USA: Idaho 10 mi. e. of Arco. Alt. 5000 ft. F. W. Pennell 15189 1931-6-20
GH: 02033532 Castilleja angustifolia (Nuttall) G. Don USA: Idaho 5700-5800', 5 miles n.w. of Howe F. W. Pennell 15193 1931-6-20
GH: 02033531 Castilleja angustifolia (Nuttall) G. Don USA: Idaho along Willow Creek, 6000-6500' n.e. of Dicke... F. W. Pennell 15211 1931-6-21
GH: 02033530 Castilleja angustifolia (Nuttall) G. Don USA: Idaho Along Morgan Creek. 6600' F. W. Pennell 15251 1931-6-23
GH: 02033529 Castilleja angustifolia (Nuttall) G. Don USA: Idaho 5 mi. n.w. of Howe F. W. Pennell 15192 1931-6-20
GH: 00056193 Castilleja arachnoidea Greenman USA: Oregon Crater Lake National Park, base of Mount Sco... F. W. Pennell 15577 1931-7-12
GH: 01876023 Castilleja aurantiaca Pennell USA: Idaho Cape Horn Pass. 6800-8000'' F. W. Pennell 15303 1931-6-26
GH: 01876247 Castilleja chromosa A. Nelson USA: Wyoming Oak Spring Canyon; near Laramie F. W. Pennell 15108 1931-6-13
GH: 01876242 Castilleja chromosa A. Nelson USA: Wyoming Oak Spring Canyon; near Laramie F. W. Pennell 15108 1931-6-13
GH: 01876537 Castilleja confusa Greene USA: Idaho Shore of Big Root River, 6000-6500' above Ma... F. W. Pennell 15210 1931-6-21
GH: 01876536 Castilleja confusa Greene USA: Idaho Garden Creek 5700-6000' W. of Challis F. W. Pennell 15262 1931-6-24
GH: 01876587 Castilleja desertorum Geyer ex Hooker USA: Wyoming W. of Red Desert F. W. Pennell 15117 1931-6-14
GH: 01876639 Castilleja elata Piper USA: California Oregon Mt., north of Monumental F. W. Pennell 15633 1931-7-17
GH: 01876756 Castilleja flava S. Watson USA: Idaho s. e. of Soda Springs F. W. Pennell 15155 1931-6-17
GH: 01876754 Castilleja flava S. Watson USA: Idaho 11 mi. n. of Georgetown F. W. Pennell 15.154 1931-6-17
GH: 01876920 Castilleja gracillima Rydberg USA: Idaho Cape Horn Pass F. W. Pennell 15307 1931-6-26
GH: 01876919 Castilleja gracillima Rydberg USA: Idaho Cape Horn F. W. Pennell 15298 1931-6-25
GH: 01877386 Castilleja lanceifolia Rydberg USA: Montana Cedar Mountains, east of Ennis F. W. Pennell 1931-8-26
GH: 01877552 Castilleja linariaefolia Bentham USA: Idaho Cusick Creek Canyon, Pocatello. Alt. 4800-53... F. W. Pennell 15177 1931-6-18
GH: 01877551 Castilleja linariaefolia Bentham USA: Idaho near Onyx F. W. Pennell 15168 1931-6-18
GH: 01877550 Castilleja linariaefolia Bentham USA: Idaho s.e. of Lava Hot Springs. 5200-5400' F. W. Pennell 15164 1931-6-18
GH: 01877548 Castilleja linariaefolia Bentham USA: Idaho Montpelier Creek, e. of Montpelier F. W. Pennell 15148 1931-6-17
GH: 01877727 Castilleja longispica A. Nelson USA: Wyoming Jackson County; s. of Morgan F. W. Pennell 15972 1931-8-30
GH: 01877732 Castilleja lutea A. Heller USA: Idaho Bear Valley F. W. Pennell 15310 1931-6-26
GH: 01877730 Castilleja lutea A. Heller USA: Idaho 6600-6800 ft., 9 miles n-w of Stanley F. W. Pennell 15286 1931-6-25
GH: 01877806 Castilleja mexicana (Hemsley) A. Gray USA: Idaho 7000-7200', Clear Creek Summit F. W. Pennell 15317 1931-6-26
GH: 01878090 Castilleja miniata Douglas ex Hooker USA: Idaho sand point F. W. Pennell 15875 1931-8-17
GH: 01878103 Castilleja miniata Douglas ex Hooker USA: Idaho Along Priest River F. W. Pennell 15868 1931-8-16
GH: 01878098 Castilleja miniata Douglas ex Hooker USA: Idaho Along Antelope Creek F. W. Pennell 15205 1931-6-21
GH: 01878170 Castilleja miniata Douglas ex Hooker USA: Montana Along Brochett Creek; Bridger Mountains, nor... F. W. Pennell 15957 1931-8-27
GH: 01878162 Castilleja miniata Douglas ex Hooker USA: Montana Cedar Mountain, east of Ennis F. W. Pennell 1931-8-26
GH: 01878160 Castilleja miniata Douglas ex Hooker USA: Montana Along Saint Regis River F. W. Pennell 15891 1931-8-18
GH: 01878346 Castilleja miniata Douglas ex Hooker USA: Wyoming Jackson County; Along Blackrock Creek F. W. Pennell 15975 1931-8-30
GH: 01878344 Castilleja miniata Douglas ex Hooker USA: Wyoming Jackson County; north of Moran F. W. Pennell 15974 1931-8-30
GH: 01878343 Castilleja miniata Douglas ex Hooker USA: Wyoming near Wind River ca 5 mi. below Dubois F. W. Pennell 15995 1931-8-31
GH: 01878447 Castilleja occidentalis Torrey USA: Montana below Clements Glacier, Glacier National Par... F. W. Pennell 15917 1931-8-22
GH: 01878443 Castilleja occidentalis Torrey USA: Montana Hidden Lake, Glacier National Park F. W. Pennell 15923 1931-8-22
GH: 00056109 Castilleja peckiana Pennell USA: Oregon Grassy opening in pine forest, Beaver Ranger... F. W. Pennell 15485 1931-7-6
GH: 00056108 Castilleja peckiana Pennell USA: Oregon Sandstone, open pine woods, Dooley Mountain,... F. W. Pennell 15455 1931
GH: 01878653 Castilleja pecten Rydberg USA: Montana Cedar Mountains, east of Ennis F. W. Pennell 15953 1931-8-26
GH: 01878651 Castilleja pecten Rydberg USA: Montana Cedar Mountain, east of Ennis F. W. Pennell 15952 1931-8-26
GH: 00056193 Castilleja pumicola Pennell USA: Oregon Crater Lake National Park, base of Mount Sco... F. W. Pennell 15577 1931-7-12
GH: 01878930 Castilleja rhexifolia Rydberg USA: Idaho Mountain slope, west of Bear F. W. Pennell 15365 1931-6-29
GH: 01878939 Castilleja rhexifolia Rydberg USA: Montana Cedar Mountain, east of Ennis F. W. Pennell 15947 1931-8-26
GH: 01878871 Castilleja roseana Eastwood USA: Idaho Cape Horn Pass F. W. Pennell 15302 1931-6-26
GH: 01879163 Castilleja septentrionalis Lindley USA: Idaho Cape Horn F. W. Pennell 15294 1931-6-25
GH: 01879619 Castilleja sp. Linnaeus USA: Idaho Lost River Mountain, east of Dickey F. W. Pennell 15218 1931-6-21
GH: 01879617 Castilleja sp. Linnaeus USA: Idaho Lost River Mountain, east of Dickey F. W. Pennell 15216 1931-6-21
GH: 01879614 Castilleja sp. Linnaeus USA: Idaho Along Morgan Creek F. W. Pennell 15255 1931-6-23
GH: 01879613 Castilleja sp. Linnaeus USA: Idaho Lost River Mountain, east of Dickey F. W. Pennell 15217 1931-6-21
GH: 01879649 Castilleja sp. Linnaeus USA: Montana Logan Pass, Glacier National Park F. W. Pennell 15915 1931-8-22
GH: 01879646 Castilleja sp. Linnaeus USA: Washington [data not captured] F. W. Pennell 15817 1931-8-9
GH: 01880027 Castilleja sp. Linnaeus USA: Idaho Lost River Mountain, east of Dickey F. W. Pennell 15223 1931-6-21
GH: 01880026 Castilleja sp. Linnaeus USA: Idaho Lost River Mountain, east of Dickey F. W. Pennell 15215 1931-6-21
GH: 01880025 Castilleja sp. Linnaeus USA: Idaho Lost River Mountain, east of Dickey F. W. Pennell 15215 1931-6-21
GH: 01880020 Castilleja sp. Linnaeus USA: Idaho Bear Valley F. W. Pennell 15313 1931-6-26
GH: 01879379 Castilleja sulphurea Rydberg USA: Idaho Cold marsh F. W. Pennell 15229 1931-6-22
GH: 01879413 Castilleja sulphurea Rydberg USA: Wyoming Jackson County; n. of Alt., Twogwotee Pass F. W. Pennell 15992 1931-8-30
GH: 01879442 Castilleja trifida Willdenow ex Melchior USA: Idaho Montpelier Creek, e. of Montpelier F. W. Pennell 15147 1931-6-17
GH: 00056210 Castilleja wherryana Pennell USA: Oregon Dooley Mountain, south of Salisbury, open pi... F. W. Pennell 15454 1931-7-4
GH: 00091102 Pedicularis bracteosa Bentham USA: Washington Along Bird Creek, Mount Adams, moist rich so... F. W. Pennell 15738 1931-7-31
GH: 00091101 Pedicularis bracteosa Bentham USA: Washington Along Bird Creek, Mount Adams, moist rich so... F. W. Pennell 15738 1931-7-31
GH: 00091100 Pedicularis bracteosa pachyrhiza (Pennell) Cronquist USA: Oregon Busby Summit, Blue Mountains, northwest of E... F. W. Pennell 15414 1931-7-2
GH: 00091096 Pedicularis bractosa latifolia (Pennell) Cronquist USA: Washington Mount Ranier, Paradis Inn, openings in conif... F. W. Pennell 15786 1931-8-5
GH: 00091097 Pedicularis bractosa latifolia (Pennell) Cronquist USA: Washington Mount Ranier, Paradis Inn, openings in conif... F. W. Pennell 15786 1931-8-5
GH: 02079478 Pedicularis lanceolata Michaux USA: Nebraska s.w. of Columbus F. W. Pennell 16008 1931-9-5
GH: 00091096 Pedicularis latifolia Pennell USA: Washington Mount Ranier, Paradis Inn, openings in conif... F. W. Pennell 15786 1931-8-5
GH: 00091097 Pedicularis latifolia Pennell USA: Washington Mount Ranier, Paradis Inn, openings in conif... F. W. Pennell 15786 1931-8-5
GH: 00091100 Pedicularis pachyrhiza Pennell USA: Oregon Busby Summit, Blue Mountains, northwest of E... F. W. Pennell 15414 1931-7-2
GH: 00091102 Pedicularis paddoensis Pennell USA: Washington Along Bird Creek, Mount Adams, moist rich so... F. W. Pennell 15738 1931-7-31
GH: 00091101 Pedicularis paddoensis Pennell USA: Washington Along Bird Creek, Mount Adams, moist rich so... F. W. Pennell 15738 1931-7-31
Plantaginaceae GH: 00466405 Besseya Rydberg USA: Idaho east of Wild Horse Creek, Weiser National Fo... F. W. Pennell 15355 1931-6-29
GH: 00466451 Besseya wyomingensis (A. Nelson) Rydberg USA: Montana Along Aspen Creek, east of Ennis F. W. Pennell 15951 1931-8-26
GH: 00466460 Besseya wyomingensis (A. Nelson) Rydberg USA: Montana Cedar Mountain, east of Ennis F. W. Pennell 15948 1931-8-26
GH: 00466488 Besseya wyomingensis (A. Nelson) Rydberg USA: Wyoming Hermosa F. W. Pennell 15106 1931-6-12
GH: 01998733 Collinsia parviflora Lindley USA: Idaho [data not captured] F. W. Pennell 15241 1931-6-22
GH: 01998730 Collinsia parviflora Lindley USA: Idaho [data not captured] F. W. Pennell 15236 1931-6-22
GH: 01998816 Collinsia parviflora Lindley USA: Oregon [data not captured] F. W. Pennell 15593 1931-7-13
GH: 01998871 Collinsia parviflora Lindley USA: Washington [data not captured] F. W. Pennell 15820 1931-8-9
GH: 01999451 Gratiola ebracteata Bentham ex A. de Candolle USA: Oregon [data not captured] F. W. Pennell 15673 1931-7-24
GH: 01999699 Gratiola neglecta Torrey USA: Oregon [data not captured] F. W. Pennell 15405 1931-7-2
GH: 02001418 Nothochelone nemorosa (Douglas) Straw USA: Oregon [data not captured] F. W. Pennell 15704 1931-7-28
GH: 02001452 Nothochelone nemorosa (Douglas) Straw USA: Oregon [data not captured] F. W. Pennell 15778 1931-8-2
GH: 02001451 Nothochelone nemorosa (Douglas) Straw USA: Oregon [data not captured] F. W. Pennell 15778 1931-8-2
GH: 02001426 Nothochelone nemorosa (Douglas) Straw USA: Washington [data not captured] F. W. Pennell 15819 1931-8-9
GH: 02001880 Penstemon albertinus Greene USA: Montana [data not captured] F. W. Pennell 15946 1931-8-25
GH: 02001946 Penstemon albidus Nuttall USA: Nebraska 7 mi. w. of Hyannis F. W. Pennell 15073 1931-6-11
GH: 02002103 Penstemon anguineus Eastwood USA: Oregon [data not captured] F. W. Pennell 15615 1931-7-15
GH: 02002142 Penstemon angustifolius Nuttall ex Pursh USA: Nebraska Gavin F. W. Pennell 15054 1931-6-9
GH: 02002303 Penstemon attenuatus Douglas ex Lindley USA: Idaho [data not captured] F. W. Pennell 15852 1931-8-15
GH: 02002299 Penstemon attenuatus Douglas ex Lindley USA: Idaho [data not captured] F. W. Pennell 15882 1931-8-18
GH: 02002338 Penstemon attenuatus Douglas ex Lindley USA: Oregon [data not captured] F. W. Pennell 15426 1931-7-2
GH: 02002337 Penstemon attenuatus Douglas ex Lindley USA: Oregon [data not captured] F. W. Pennell 15441 1931-7-3
GH: 02002369 Penstemon attenuatus hyacinthinus Pennell USA: Oregon [data not captured] F. W. Pennell 15429 1931-7-2
GH: 02002398 Penstemon attenuatus pseudoprocerus (Rydberg) Cronquist USA: Idaho [data not captured] F. W. Pennell 15201 1931-6-21
GH: 02002397 Penstemon attenuatus pseudoprocerus (Rydberg) Cronquist USA: Idaho [data not captured] F. W. Pennell 15324 1931-6-26
GH: 02002417 Penstemon attenuatus pseudoprocerus (Rydberg) Cronquist USA: Oregon [data not captured] F. W. Pennell 15406 1931-7-2
GH: 02002409 Penstemon attenuatus pseudoprocerus (Rydberg) Cronquist USA: Montana [data not captured] F. W. Pennell 15892 1931-8-18
GH: 02002422 Penstemon attenuatus pseudoprocerus (Rydberg) Cronquist USA: Wyoming west of Twogwotee Pass F. W. Pennell 15978 1931-8-30
GH: 02002587 Penstemon azureus Bentham USA: Oregon [data not captured] F. W. Pennell 15617 1931-7-15
GH: 02002757 Penstemon barrettiae A. Gray USA: Oregon [data not captured] F. W. Pennell 15716 1931-7-29
GH: 00091187 Penstemon brachyanthus Pennell USA: Oregon Hood River Meadows, ledges of andesitic rock... F. W. Pennell 15710 1931-7-28
GH: 02002945 Penstemon caelestinus Pennell USA: Montana [data not captured] F. W. Pennell 15905 1931-8-19
GH: 02118160 Penstemon cardwellii Howell USA: Oregon [data not captured] F. W. Pennell 15677 1931-7-27
GH: 02118242 Penstemon cinereus Piper USA: Oregon [data not captured] F. W. Pennell 15486 1931-7-6
GH: 02118241 Penstemon cinereus Piper USA: Oregon [data not captured] F. W. Pennell 15592 1931-7-13
GH: 02118240 Penstemon cinereus Piper USA: Oregon [data not captured] F. W. Pennell 15500 1931-7-6
GH: 02118276 Penstemon cleburnei M. E. Jones USA: Wyoming Rawlins F. W. Pennell 15110 1931-6-14
GH: 02118330 Penstemon cobaea Nuttall USA: Texas Bet. San Antonio and New Braunfels F. W. Pennell 1816 1931-4-13
GH: 02118445 Penstemon confertus Douglas ex Lindley USA: Idaho [data not captured] F. W. Pennell 15883 1931-8-18
GH: 02118483 Penstemon confertus Douglas ex Lindley USA: Oregon [data not captured] F. W. Pennell 15435 1931-7-3
GH: 02118578 Penstemon cusickii A. Gray USA: Oregon [data not captured] F. W. Pennell 15460 1931-7-4
GH: 02118570 Penstemon cusickii A. Gray USA: Idaho [data not captured] F. W. Pennell 15330 1931-6-28
GH: 02118585 Penstemon cyananthus Hooker USA: Idaho [data not captured] F. W. Pennell 15157 1931-6-17
GH: 02118583 Penstemon cyananthus Hooker USA: Idaho [data not captured] F. W. Pennell 15172 1931-6-18
GH: 02118582 Penstemon cyananthus Hooker USA: Idaho [data not captured] F. W. Pennell 15141 1931-6-16
GH: 02118581 Penstemon cyananthus Hooker USA: Idaho [data not captured] F. W. Pennell 15145 1931-6-17
GH: 02118636 Penstemon cyananthus Hooker USA: Wyoming 4 miles north of Cokeville F. W. Pennell 15137 1931-6-15
GH: 02118634 Penstemon cyananthus Hooker USA: Wyoming one mile east of Nugget F. W. Pennell 15136 1931-6-15
GH: 02118651 Penstemon cyaneus Pennell USA: Idaho [data not captured] F. W. Pennell 15196 1931-6-21
GH: 02118650 Penstemon cyaneus Pennell USA: Idaho [data not captured] F. W. Pennell 15186 1931-6-20
GH: 02118660 Penstemon cyaneus Pennell USA: Idaho [data not captured] F. W. Pennell 15185 1931-6-20
GH: 02118743 Penstemon davidsonii Greene USA: Washington [data not captured] F. W. Pennell 15801 1931-8-5
GH: 02118734 Penstemon davidsonii Greene USA: Oregon [data not captured] F. W. Pennell 15690 1931-7-27
GH: 02118733 Penstemon davidsonii Greene USA: Oregon [data not captured] F. W. Pennell 15504 1931-7-7
GH: 02118732 Penstemon davidsonii Greene USA: Oregon [data not captured] F. W. Pennell 15623 1931-7-15
GH: 02118774 Penstemon davidsonii menziesii (D. D. Keck) Cronquist USA: Washington [data not captured] F. W. Pennell 15807 1931-8-6
GH: 02118773 Penstemon davidsonii menziesii (D. D. Keck) Cronquist USA: Washington [data not captured] F. W. Pennell 15729 1931-7-30
GH: 02118841 Penstemon deustus Douglas USA: Idaho [data not captured] F. W. Pennell 15173 1931-6-18
GH: 02118884 Penstemon deustus Douglas USA: Oregon [data not captured] F. W. Pennell 15590 1931-7-13
GH: 02119161 Penstemon diphyllus Rydberg USA: Idaho [data not captured] F. W. Pennell 15242 1931-6-22
GH: 02119166 Penstemon diphyllus Rydberg USA: Montana [data not captured] F. W. Pennell 15933 1931-8-24
GH: 02119328 Penstemon ellipticus Coulter & Fisher USA: Montana [data not captured] F. W. Pennell 15912 1931-8-22
GH: 02119348 Penstemon eriantherus Pursh USA: Montana [data not captured] F. W. Pennell 15931 1931-8-24
GH: 02119386 Penstemon eriantherus Pursh USA: Wyoming 3 miles s.w. of Torrington F. W. Pennell 15095 1931-6-12
GH: 00091515 Penstemon eriantherus redactus Pennell & D. D. Keck USA: Idaho 14 miles west of Darlington, along Antelope ... F. W. Pennell 15200 1931-6-21
GH: 02119437 Penstemon euglaucus English USA: Washington [data not captured] F. W. Pennell 15725 1931-7-30
GH: 02119434 Penstemon euglaucus English USA: Oregon [data not captured] F. W. Pennell 15699 1931-7-28
GH: 02119432 Penstemon euglaucus English USA: Oregon [data not captured] F. W. Pennell 15713 1931-7-28
GH: 02119430 Penstemon euglaucus English USA: Oregon [data not captured] F. W. Pennell 15507 1931-7-7
GH: 02119525 Penstemon fremontii Torrey & A. Gray USA: Wyoming Riner F. W. Pennell 15113 1931-6-14
GH: 02119524 Penstemon fremontii Torrey & A. Gray USA: Wyoming 14 mi. west of Tipton F. W. Pennell 1931-6-14
GH: 02119523 Penstemon fremontii Torrey & A. Gray USA: Wyoming 16 mi. W. of Tipton F. W. Pennell 15119 1931-6-14
GH: 02119547 Penstemon fruticosus (Pursh) Greene USA: Idaho [data not captured] F. W. Pennell 15304 1931-6-26
GH: 02119581 Penstemon fruticosus (Pursh) Greene USA: Oregon [data not captured] F. W. Pennell 15389 1931-6-30
GH: 02119580 Penstemon fruticosus (Pursh) Greene USA: Oregon [data not captured] F. W. Pennell 15702 1931-7-28
GH: 02119579 Penstemon fruticosus (Pursh) Greene USA: Oregon [data not captured] F. W. Pennell 15438 1931-7-3
GH: 02119577 Penstemon fruticosus (Pursh) Greene USA: Oregon [data not captured] F. W. Pennell 15520 1931-7-6
GH: 02119574 Penstemon fruticosus (Pursh) Greene USA: Oregon [data not captured] F. W. Pennell 15707 1931-7-28
GH: 02119608 Penstemon fruticosus (Pursh) Greene USA: Washington [data not captured] F. W. Pennell 15733 1931-7-31
GH: 02119624 Penstemon fruticosus douglasii (Hooker) C. K. Schneider USA: Montana [data not captured] F. W. Pennell 15938 1931-8-25
GH: 02119646 Penstemon fruticosus scouleri (Lindley) Cronquist USA: Idaho [data not captured] F. W. Pennell 15873 1931-8-17
GH: 02119644 Penstemon fruticosus scouleri (Lindley) Cronquist USA: Idaho [data not captured] F. W. Pennell 15873 1931-8-17
GH: 02119701 Penstemon gairdneri oregonus A. Gray USA: Idaho [data not captured] F. W. Pennell 15332 1931-6-28
GH: 02119751 Penstemon glaber Pursh USA: Nebraska Scottsbluff F. W. Pennell 15087 1931-6-11
GH: 02120079 Penstemon grandiflorus Nuttall USA: Nebraska prairie S.W. of Columbus F. W. Pennell 15034 1931-6-8
GH: 02120398 Penstemon humilis Nuttall ex A. Gray USA: Idaho [data not captured] F. W. Pennell 15199 1931-6-21
GH: 02120397 Penstemon humilis Nuttall ex A. Gray USA: Idaho [data not captured] F. W. Pennell 15219 1931-6-21
GH: 02120396 Penstemon humilis Nuttall ex A. Gray USA: Idaho [data not captured] F. W. Pennell 15194 1931-6-20
GH: 02120427 Penstemon humilis Nuttall ex A. Gray USA: Idaho [data not captured] F. W. Pennell 15265 1931-6-24
GH: 02120426 Penstemon humilis Nuttall ex A. Gray USA: Idaho [data not captured] F. W. Pennell 15144 1931-6-17
GH: 02120425 Penstemon humilis Nuttall ex A. Gray USA: Idaho [data not captured] F. W. Pennell 15306 1931-6-26
GH: 02120500 Penstemon humilis Nuttall ex A. Gray USA: Wyoming 4 mi. n. of Cokeville F. W. Pennell 15138 1931-6-15
GH: 02120810 Penstemon laricifolius exilifolius (A. Nelson) D. D. Keck USA: Wyoming south of Red Buttes F. W. Pennell 16000 1931-9-3
GH: 02121007 Penstemon lyallii (A. Gray) A. Gray USA: Montana [data not captured] F. W. Pennell 15900 1931-8-19
GH: 02121048 Penstemon montanus Greene USA: Idaho [data not captured] F. W. Pennell 15268 1931-6-24
GH: 02121302 Penstemon oreocharis Greene USA: Oregon [data not captured] F. W. Pennell 15584 1931-7-21
GH: 02121354 Penstemon ovatus Douglas ex Hooker USA: Idaho [data not captured] F. W. Pennell 15271 1931-6-24
GH: 02121340 Penstemon ovatus Douglas ex Hooker USA: Oregon [data not captured] F. W. Pennell 15676 1931-7-26
GH: 02121334 Penstemon ovatus Douglas ex Hooker USA: Oregon [data not captured] F. W. Pennell 15386 1931-6-30
GH: 02121370 Penstemon ovatus pinetorum Piper & Beattie USA: Idaho [data not captured] F. W. Pennell 15855 1931-8-15
GH: 02121612 Penstemon payettensis A. Nelson & J. F. Macbride USA: Idaho [data not captured] F. W. Pennell 15325 1931-6-26
GH: 02121611 Penstemon payettensis A. Nelson & J. F. Macbride USA: Idaho [data not captured] F. W. Pennell 15333 1931-6-28
GH: 02121615 Penstemon payettensis A. Nelson & J. F. Macbride USA: Idaho [data not captured] F. W. Pennell 15261 1931-6-24
GH: 02121614 Penstemon payettensis A. Nelson & J. F. Macbride USA: Idaho [data not captured] F. W. Pennell 15282 1931-6-25
GH: 02121628 Penstemon payettensis A. Nelson & J. F. Macbride USA: Oregon [data not captured] F. W. Pennell 15387 1931-6-30
GH: 00091377 Penstemon peckii Pennell USA: Oregon Ca. 9 miles northwest of Sisters, sandy wood... F. W. Pennell 15528 1931-7-8
GH: 00091378 Penstemon peckii Pennell USA: Oregon Ca. 9 miles northwest of Sisters, sandy wood... F. W. Pennell 15528 1931-7-8
GH: 02121641 Penstemon perpulcher A. Nelson USA: Idaho [data not captured] F. W. Pennell 15327 1931-6-27
GH: 02121771 Penstemon procerus Douglas ex Graham USA: Idaho [data not captured] F. W. Pennell 15285 1931-6-25
GH: 02121824 Penstemon procerus Douglas ex Graham USA: Oregon [data not captured] F. W. Pennell 15462 1931-7-4
GH: 02121890 Penstemon procerus Douglas ex Graham USA: Wyoming 4 miles west of Kemmerer F. W. Pennell 15131 1931-6-15
GH: 00091187 Penstemon procerus brachyanthus (Pennell) Cronquist USA: Oregon Hood River Meadows, ledges of andesitic rock... F. W. Pennell 15710 1931-7-28
GH: 02121914 Penstemon procerus brachyanthus (Pennell) Cronquist USA: Oregon [data not captured] F. W. Pennell 15687 1931-7-27
GH: 02121913 Penstemon procerus brachyanthus (Pennell) Cronquist USA: Oregon [data not captured] F. W. Pennell 15511 1931-7-7
GH: 02121912 Penstemon procerus brachyanthus (Pennell) Cronquist USA: Oregon [data not captured] F. W. Pennell 15512 1931-7-7
GH: 02121963 Penstemon procerus tolmiei (Hooker) Cronquist USA: Washington [data not captured] F. W. Pennell 15800 1931-8-5
GH: 02121962 Penstemon procerus tolmiei (Hooker) Cronquist USA: Washington [data not captured] F. W. Pennell 15788 1931-8-5
GH: 02121961 Penstemon procerus tolmiei (Hooker) Cronquist USA: Washington [data not captured] F. W. Pennell 15808 1931-8-6
GH: 02122026 Penstemon pumilus Nuttall USA: Idaho [data not captured] F. W. Pennell 15190 1931-6-20
GH: 02122037 Penstemon radicosus A. Nelson USA: Idaho [data not captured] F. W. Pennell 15180 1931-6-18
GH: 02122036 Penstemon radicosus A. Nelson USA: Idaho [data not captured] F. W. Pennell 15146 1931-6-17
GH: 02122084 Penstemon radicosus A. Nelson USA: Wyoming just west of Rawlins F. W. Pennell 15111 1931-6-14
GH: 02122083 Penstemon radicosus A. Nelson USA: Wyoming just west of Rawlins F. W. Pennell 15997 1931-8-31
GH: 02122135 Penstemon richardsonii Douglas ex Lindley USA: Oregon [data not captured] F. W. Pennell 15498 1931-7-6
GH: 02122134 Penstemon richardsonii Douglas ex Lindley USA: Oregon [data not captured] F. W. Pennell 15481 1931-7-6
GH: 02122133 Penstemon richardsonii Douglas ex Lindley USA: Oregon [data not captured] F. W. Pennell 15497 1931-7-6
GH: 02122132 Penstemon richardsonii Douglas ex Lindley USA: Oregon [data not captured] F. W. Pennell 15675 1931-7-26
GH: 02122127 Penstemon richardsonii Douglas ex Lindley USA: Oregon [data not captured] F. W. Pennell 15714 1931-7-29
GH: 02122161 Penstemon richardsonii Douglas ex Lindley USA: Washington [data not captured] F. W. Pennell 15766 1931-8-1
GH: 02122160 Penstemon richardsonii Douglas ex Lindley USA: Washington [data not captured] F. W. Pennell 15835 1931-8-11
GH: 02122159 Penstemon richardsonii Douglas ex Lindley USA: Washington [data not captured] F. W. Pennell 15845 1931-8-13
GH: 02122181 Penstemon richardsonii dentatus (D. D. Keck) Cronquist USA: Oregon [data not captured] F. W. Pennell 15468 1931-7-5
GH: 02122230 Penstemon roezlii Regel USA: Oregon [data not captured] F. W. Pennell 15598 1931-7-14
GH: 02122252 Penstemon rupicola (Piper) Howell USA: Oregon [data not captured] F. W. Pennell 15560 1931-7-10
GH: 02122279 Penstemon rupicola (Piper) Howell USA: Oregon [data not captured] F. W. Pennell 15556 1931-7-10
GH: 02122382 Penstemon rydbergii varians (A. Nelson) Cronquist USA: Oregon [data not captured] F. W. Pennell 15390 1931-6-30
GH: 02122375 Penstemon rydbergii varians (A. Nelson) Cronquist USA: Idaho [data not captured] F. W. Pennell 15312 1931-6-26
GH: 02122374 Penstemon rydbergii varians (A. Nelson) Cronquist USA: Idaho [data not captured] F. W. Pennell 15283 1931-6-25
GH: 02122478 Penstemon serrulatus Menzies ex Smith USA: Oregon [data not captured] F. W. Pennell 15701 1931-7-28
GH: 01801608 Penstemon sp. USA: Washington [data not captured] F. W. Pennell 15755 1931-7-31
GH: 01801644 Penstemon sp. USA: Idaho [data not captured] F. W. Pennell 15232 1931-6-22
GH: 02122640 Penstemon speciosus Douglas USA: Oregon [data not captured] F. W. Pennell 15457 1931-7-4
GH: 02122639 Penstemon speciosus Douglas USA: Oregon [data not captured] F. W. Pennell 15444 1931-7-3
GH: 02122672 Penstemon speciosus Douglas USA: Oregon [data not captured] F. W. Pennell 15487 1931-7-6
GH: 02122691 Penstemon speciosus Douglas USA: Oregon [data not captured] F. W. Pennell 15576 1931-7-12
GH: 02122825 Penstemon subglaber Rydberg USA: Idaho [data not captured] F. W. Pennell 15181 1931-6-18
GH: 00091410 Penstemon subserratus Pennell USA: Washington Gotchen Creek Ranger Station, Columbia Natio... F. W. Pennell 15732 1931-7-31
GH: 02122862 Penstemon subserratus Pennell USA: Oregon [data not captured] F. W. Pennell 15700 1931-7-28
GH: 01801016 Penstemon triphyllus Douglas USA: Oregon [data not captured] F. W. Pennell 15374 1931-6-29
GH: 00091496 Penstemon truncatus puberulus Pennell USA: Oregon South of Lonroth, gravelly pine-flats F. W. Pennell 15562 1931-7-11
GH: 01801185 Penstemon venustus Douglas USA: Idaho [data not captured] F. W. Pennell 15338 1931-6-29
GH: 01801184 Penstemon venustus Douglas USA: Idaho [data not captured] F. W. Pennell 15339 1931-6-28
GH: 01801183 Penstemon venustus Douglas USA: Idaho [data not captured] F. W. Pennell 15349 1931-6-29
GH: 01801198 Penstemon venustus Douglas USA: Oregon [data not captured] F. W. Pennell 15428 1931-7-2
GH: 01801270 Penstemon virens Pennell ex Rydberg USA: Wyoming 6 miles west of Laramie F. W. Pennell 15107 1931-6-13
GH: 01801496 Penstemon whippleanus A. Gray USA: Wyoming head of Wind River, east of Twogwotee Pass F. W. Pennell 15986 1931-8-30
GH: 00091515 Penstemon whitedii tristis Pennell & D. D. Keck USA: Idaho 14 miles west of Darlington, along Antelope ... F. W. Pennell 15200 1931-6-21
GH: 01801542 Penstemon wilcoxii Rydberg USA: Montana [data not captured] F. W. Pennell 15905 1931-8-21
GH: 01803568 Plantago patagonica Jacquin USA: Nebraska n.e. of Duncan F. W. Pennell 15040 1931-6-8
GH: 01804540 Synthyris missurica (Rafinesque) Pennell USA: Oregon [data not captured] F. W. Pennell 15391 1931-6-30
GH: 01804561 Synthyris missurica stellata (Pennell) Kartesz & Gandhi USA: Oregon [data not captured] F. W. Pennell 15773 1931-8-2
GH: 01804600 Synthyris reniformis (Douglas) Bentham USA: Oregon [data not captured] F. W. Pennell 15771 1931-8-2
GH: 01804596 Synthyris reniformis (Douglas) Bentham USA: Oregon [data not captured] F. W. Pennell 15647 1931-7-18
GH: 01804595 Synthyris reniformis (Douglas) Bentham USA: Oregon [data not captured] F. W. Pennell 15670 1931-7-20
GH: 01804673 Tonella floribunda A. Gray USA: Idaho [data not captured] F. W. Pennell 15369 1931-6-29
GH: 01804963 Veronica americana Schweinitz ex Bentham USA: Idaho [data not captured] F. W. Pennell 15226 1931-6-21
GH: 01804961 Veronica americana Schweinitz ex Bentham USA: Idaho [data not captured] F. W. Pennell 15165 1931-6-18
GH: 01804954 Veronica americana Schweinitz ex Bentham USA: Idaho [data not captured] F. W. Pennell 15878 1931-8-17
GH: 01805060 Veronica americana Schweinitz ex Bentham USA: Oregon [data not captured] F. W. Pennell 15648 1931-7-18
GH: 01805220 Veronica anagallis-aquatica Linnaeus USA: Idaho [data not captured] F. W. Pennell 15171 1931-6-18
GH: 01805669 Veronica cusickii A. Gray USA: Washington [data not captured] F. W. Pennell 15825 1931-8-9
GH: 01805653 Veronica cusickii A. Gray USA: Washington [data not captured] F. W. Pennell 15796 1931-8-5
GH: 01805647 Veronica cusickii A. Gray USA: Washington [data not captured] F. W. Pennell 15793 1931-8-5
GH: 01811159 Veronica peregrina xalapensis (Kunth) Pennell USA: Idaho [data not captured] F. W. Pennell 15197 1931-6-21
GH: 01811188 Veronica peregrina xalapensis (Kunth) Pennell USA: Montana [data not captured] F. W. Pennell 15939 1931-8-26
GH: 01811603 Veronica scutellata Linnaeus USA: Washington [data not captured] F. W. Pennell 15784 1931-8-4
GH: 01811933 Veronica serpyllifolia humifusa (Dickson) Syme USA: Idaho [data not captured] F. W. Pennell 15287 1931-6-25
GH: 01812131 Veronica wormskjoldii Roemer & Schultes USA: Idaho [data not captured] F. W. Pennell 15290 1931-6-25
GH: 01812473 Veronica wormskjoldii Roemer & Schultes USA: Wyoming source of Wind River, Twogwotee Pee F. W. Pennell 15984 1931-8-30
GH: 01812465 Veronica wormskjoldii Roemer & Schultes USA: Washington [data not captured] F. W. Pennell 15826 1931-8-9
GH: 01812458 Veronica wormskjoldii Roemer & Schultes USA: Oregon [data not captured] F. W. Pennell 15509 1931-7-7
GH: 01812448 Veronica wormskjoldii Roemer & Schultes USA: Montana [data not captured] F. W. Pennell 15908 1931-8-22
Polygonaceae GH: 01618016 Eriogonum acaule Nuttall USA: Wyoming 4 mi. W. of Kemmerer F. W. Pennell 15135 1931-6-15
Primulaceae GH: 01922830 Dodecatheon sp. USA: Idaho 16 mi. w. of Darlington F. W. Pennell 15204 1931-6-21
Ranunculaceae GH: 01720256 Aconitum columbianum Nuttall USA: Montana Saint Regis Lake F. W. Pennell 15886 1931-8-18
Rhamnaceae GH: 01790411 Ceanothus sp. USA: Nebraska north of Halsey F. W. Pennell 15066 1931-6-9
Rubiaceae GH: 02140761 Galium sp. USA: Nebraska s.w. of Columbus F. W. Pennell 15038 1931-6-8
Scrophulariaceae GH: 00078846 Diplacus jepsonii (A. L. Grant) G. L. Nesom USA: Oregon near Davis Lake F. W. Pennell 15551 1931-7-10
GH: 01841784 Erythranthe guttata (de Candolle) G. L. Nesom USA: Idaho Along brook in cold marsh F. W. Pennell 15228 1931-6-22
GH: 01841783 Erythranthe guttata (de Candolle) G. L. Nesom USA: Idaho Along stream of hot water, from hot sulphur,... F. W. Pennell 15278 1931-6-25
GH: 00549206 Erythranthe microphylla (Bentham) G. L. Nesom USA: Oregon Elk Lake F. W. Pennell 15547 1931-7-9
GH: 00549207 Erythranthe microphylla (Bentham) G. L. Nesom USA: Oregon Elk Lake F. W. Pennell 15547 1931-7-9
GH: 01842391 Erythranthe moschata (Douglas ex Lindley) G. L. Nesom USA: Idaho on mountain south of Sand Point F. W. Pennell 15877 1931-8-17
GH: 00078846 Mimulus jepsonii A. L. Grant USA: Oregon near Davis Lake F. W. Pennell 15551 1931-7-10
GH: 00549206 Mimulus laxus Pennell ex Peck USA: Oregon Elk Lake F. W. Pennell 15547 1931-7-9
GH: 00549207 Mimulus laxus Pennell ex Peck USA: Oregon Elk Lake F. W. Pennell 15547 1931-7-9
GH: 00078846 Mimulus microcarpus Pennell USA: Oregon near Davis Lake F. W. Pennell 15551 1931-7-10
GH: 00078846 Mimulus nanus jepsonii (A. L. Grant) D. M. Thompson USA: Oregon near Davis Lake F. W. Pennell 15551 1931-7-10