36 
| 
) Order 90.—LEMNACE. 
Lemna, L. Duckweed. 
trisulca, L. Borders of ponds. 
| minor, L. Still water. Common. 
| polyrrhiza, L. 
Order 91.—TYPHACE/E. 
Typna, Tourn. Cat-tail. 
. latifolia L. Swamps. Common. 
| angustifolia. Yerrisburgh, Pringle. 
Spareantom, Tourn. 
| eurycarpum, Eng. Ditches and ponds. 
P| simplex, Huds. 
= Ke var. Nuttallii, Gray. 
| « _-var. fluitans, Gray. Sterling Pond, Pringle. 


Order 92.—NATA DACE®. 
Naras, L. 
Jlexiles, Rost. Sluggish streams and ponds. 
Poramoceton, Tourn. 
compressus, L. Rivers and ponds. Not common. 
Claytonii, Tuck. Dead Creek, Ferrisburgh, Pringle. 
spirillus, Tauck. Brattleboro, Frost. 
hybridus, Mx. Lake Champlain. 
rufescens, Schr. ‘* Windsor, Vermont. Infrequent. 
lonchites, Tack. Pringle. 
lucens, L. Ponds. 5 
amplifolius, Tuck. Pringle. . “id 
gramineus, L. Rivers and Ponds. | , 
perfoliatus, L. . 
obtusifolius. Shelburne Pond, Pringle. 
natans, L. Ponds. 
paucifiorus, Pursh. 
pectinatus, L. Lake Champlain. 
prelongus, Wulf. Willoughby Lake, Wood. 
pulcher, Tuck. Brattleboro, Frost. 
Order 93.—ALIS MACE. 
ScHEucHzERIA, L. 
palustris, L. Bogs. 
Auisma, L. 
plantago, L. Common. 
Saarrraria, L. 
lanceolata, L. Not common. 

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a : 
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