Flora of Rensselaer County, N. Y. 31 



var. coarctatus, Eng. 

 Luzula vernalis, DC. 



campestris, DC 



TYPHACE.E. 

 Typha latifolia, L. 



angustifolia, L. 

 Sparganium eurycarpum, Eng. 



simplex, Huds. 



var. androcladum, Eng. 



var. angustifolium, Eng. 



var. fluitans, Eng. Sandlake, Peck; Hoag's Corners, Wibbe. 

 Infrequent. 



ARACE^. 

 Arisaema triphyllum, Torr. Wild-tlkmp. 



Dracontium, Sehott. 

 Peltandra undulata, Raf. 

 Calla palustris, L. 



Symplocarpus foetidus, Salisb. Skunk' s-cabbage. 

 Orontium aquaticum, L. 

 Acorus calamus, L. Sweet-flag. 



LEMNACE^. 

 Spirodela polyrrhisca, Schl. 

 Lemna minor, L. 



perpusilla, Torr. Nassau Creek, Wibbe. Local. 



ALISMACE^E. 

 Alisma Plantago, L. 

 Sagittaria variabilis, Eng. 



var. obtusa, Eng. 



var. diversifolia, Eng. 



var. angustifolia, Eng. 



var. hastata, Eng. 



var. gracilis, Eng. Grafton Ponds, Gordinier. Infrequent. 



heterophylla, Ph. 



var. elliptica, Eng. 



var. rigida, Eng. 



var. angustifolia, Eng. 



graminea, Mx, 



NAIADACE^l. 

 Triglochin palustris, L. Sandlake, Stephentown, Wibbe. Very 



rare. 

 Potamogeton natans, L. 



Oakcsiana, Rob. Sandlake, Peck. Rare. 

 Pennsylvanicus, Cham. Poestenkill, Dr. Gordinier; 

 Hoag's Corners, Wibbe. Infrequent. 



