194 
[Assembly 
Andropogon, (continued.) 
furcatus, Muhl. Rocky banks. September-October, 
nutans, L . Sandy fields and rocky hills . September . 
Leersia, Sivartz. White Grass. 
virginica, Willd. Wet woods and thickets . August . 
oryzoides, Swartz. Ditches and swamps. August-September. 
ZizANiA, L . Wild Rice, Water Oats . 
aquatica, Lamb. Tuscarora Rice. Fresh or brackish water. Aug. 
Obs. Z. fluitans, Miclix. according to the herbarium of that botanist, 
was not found in Lake Champlain, as stated by mistake in the Flora 
Boreali- Americana^ but near Charleston, South-Carolina. 
CLASS IV. ACROGENS. 
Order EQUISETACE.^ . The Horse-tail Tribe. 
Equisetum, L. Horse-tail. 
limosum, L . Swamps and borders of ponds . June . 
sylvaticum, L. Moist woods. 
hyemale, L. Scouring Rush, Swamps and wet banks. May- 
June . 
variegatum, Scleicli. Wet sandy places, among rocks. Niagara, 
Dr. Kinniciitt. 
arvense, L. Low grounds. April. 
scirpoides, Michx. Shady rocky places ; northern counties . 
Order FILICES. The Fern Tribe. 
Sub-Order Polypodie.e . 
PoLYPODiUM, L. Polypody. 
vulgare, L. Rocky woods and hill sides. July, 
hexagonoplerum, Michx. Moist woods. July, 
phegopteris, L. P. connectile, Michx. Shady woods. July, 
calcareum, Smith. Moist shady woods ; northern and western 
counties . July . 
AsPiDiUM, Swartz. Shield Fern. 
acrostichoides, Willd. Shady rocky hill sides . June-August. 
Var. incisum. Gray. A. Schv/einitzh, Beck. Shady ravines, 
near Hamilton College . Dr. Gray . 
