128 THE CAYUGA FLORA. 



447. Poa, Linn. 



1230. P. annua, L. (H. and C. ) 

 Roadsides and yards ; frequent. May-Oct. 



1231. P. compressa, L. (H. and C.) 

 Dry banks and woods ; common. June-Aug. 



Torrey's var. sylvestris is frequent in woods. 



1232. P. serotina, Ehrh. fH. and C. ; 

 Wet meadows, usually ; frequent. June-July. 



It occasionally appears in dry woods, growing singly. High 

 banks near Ithaca Falls. Case. Woods. High hills in Danby, etc. 



1233. P. pratensis, L. Kv. BLUE-GRASS. (H.andC.) 

 Fields ; common. June. 



1234. P. trivialis, L. 



Marshes and fields, and the deep swamps. June. 

 From the large number of swamp stations, it is probably indige- 

 nous in this region. 



1235. P. sylvestris, Gray. 



Slopes of ravines ; rare. June. 



Below Green-Tree Falls — the genuine form. 



1236. P. sylvestris, Gray, var. palustris. 



Sphagnum bogs and cold swamps. Round Marshes. Michigan 

 Hollow. Wyckoff swamp. Culm weak and slender, branches of 

 the panicle, in twos and threes deflexed, otherwise like the type. 

 A much larger rather robust form grows in Round Marshes, and in 

 Dr3'deu-Lansing Swamp. 



1237. P. debilis, Torr. (H.) 

 Dry woods ; frequent. May 20-June. 



1238. alsodes, Gray. (H.andC.) 

 Ravines — Fall Cr., Six Mile Cr., and especially in the deep 



swamps, like Beaver Cr. and Freeville swamps. 



448. GEYCERIA, R. Br. 



1239. G. Canadensis, Trin. RATTLESNAKE GRASS. 



Marshes; rare. Summit Marsh. "Junius," (Sartwell, H. and C.) 

 July. 



1240. G. elongata, Trin.; doubtful and overripe specimens from north 

 of Freeville ; and west of Locke Pond, (F. C. Curtice,) probably 

 belong here. 



1241. G. nervata, Trin. (H. and C.) 

 Marshy ground ; common. May-June. 



This species is variable, the purple-flowered specimens with large 

 spikelets, appear quite different from those with the smaller green 

 spikelets. 



1242. G. pallida, Trin. (H.andC.) 

 Marshes in water ; not common. June. 



Near the Corner-of-the-lake. Cayuta L. Danby, in Jennings 

 Pond. 



1243. G.arundinacea, Kth. (G- aquatica, Man., p. 627.) (H. and C.) 

 Wet meadows ; common. June. 



