Harvard University Herbaria & Libraries

Nymphaeaceae
GH: 02269174 Nymphaea odorata Aiton Guyana: Pomeroon District: Lake Tapakuma Reservoir; ... C. N. Horn John Wiersema 4533a 1991-3-5
Polygonaceae
GH: 02363431 Persicaria hydropiperoides (Michaux) Small USA: South Carolina [data not captured] C. N. Horn Dorraine E. Mytko 4658 1991-7-24
Pontederiaceae
GH: 02171964 Heteranthera dubia MacMillan USA: Alabama [data not captured] C. N. Horn 4685 1991-8-1
GH: 01919254 Heteranthera limosa Willdenow USA: Texas Roadside ditch at cow pasture along TX 239, ... C. N. Horn John Wiersema 4718 1991-8-3
GH: 01919293 Heteranthera reniformis Ruiz & Pavon USA: South Carolina Co. rt 42 at tributary to Little River, 1.6 ... C. N. Horn [data not captured] 4589 1991-7-9
GH: 02171970 Heteranthera reniformis Ruiz & Pavon USA: Virginia [data not captured] C. N. Horn Ted Bradley and Gary Fl... 4773 1991-8-17
GH: 02068412 Pontederia cordata Linnaeus USA: South Carolina Ethridge Mill Pond. Along US 178, 0.8 mi E o... C. N. Horn 4385 1991-5-27
GH: 02068415 Pontederia cordata Linnaeus USA: South Carolina Co. rt 306 at tributary to Jim Branch of Tur... C. N. Horn [data not captured] 4480 1991-6-11