Harvard University Herbaria & Libraries

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Ceratophyllaceae
GH: 02073434 Ceratophyllum echinatum A. Gray USA: Ohio [data not captured] M. L. Roberts 711 1970-8-13
GH: 02073433 Ceratophyllum echinatum A. Gray USA: Ohio [data not captured] M. L. Roberts 711 1970-8-13
Cyperaceae
GH: 01772667 Carex grayi Carey Canada: Ontario [data not captured] M. L. Roberts John Thieret 1541 1971-7-22
Plantaginaceae
GH: 02119081 Callitriche heterophylla Pursh USA: New Jersey [data not captured] M. L. Roberts 5590 1982-4-17
Potamogetonaceae
GH: 01572215 Potamogeton foliosus Rafinesque USA: Ohio [data not captured] M. L. Roberts 1645 1971-8-12
GH: 01695782 Potamogeton pusillus Linnaeus USA: Ohio 2.1 air mi. NE of Doylestown. East of Rt. 21... M. L. Roberts 790 1970-9-12
GH: 01695783 Potamogeton pusillus Linnaeus USA: Ohio 0.5 air mi. NW of Put-in-Bay. Put-in-Bay Twp... M. L. Roberts 1307 1971-7-7
GH: 01746149 Potamogeton pusillus tenuissimus (Mertens & Koch) R. R. Haynes & Hellquist USA: Ohio 10 air mi. E of Oregon. Magee Marsh, Crane C... M. L. Roberts 734 1970-9-3