The Flora of the Cayuga Lake Basin 75 



The lower sheaths vary from hairy to glabrous, and the teeth of the flowering 

 glumes from 1 to 3 mm. in length, transitional forms being frequent. These char- 

 acters are therefore of no value in separating the two species. 



2. D. compressa Aust. 



Open woods, old fields, and shores, in gravelly, mostly neutral, soil ; infrequent. 

 July. 



In the shade of coniferous woods, North Spencer; near Danby (D.) ; hilltop one 

 mile n. of Caroline Center; Turkey Hill (£>.) ; Dart Woods (D.) ; high hills s. w. 

 of Dryden Lake; shore of Dryden Lake (D.) ; woods, North Lansing; banks near 

 Lake Como (Locke Pond, D.) ; very abundant w. of Etna. 



N. S. to N. Y., southw. to N. C. and Tenn. ; rare or absent on the Coastal Plain. 



Tribe 4. Agrostideae 



22. Calamagrostis Adans. 

 a. Summit of the sheath bearded ; callus hairs about three-fourths the length of the 

 flowering glume ; spikelets about 4.5 mm. long ; panicle usually contracted but not 

 dense. 1. C. perplexa 



a. Summit of the sheath glabrous ; callus hairs about equaling the flowering glume ; 

 spikelets 2.5-5 mm. long. 

 b. Panicle open; empty glumes thin, slightly scabrous, acuminate, usually open in 

 fruit ; spikelets 2.5-3.5 mm. long ; leaves flat in drying. 2. C. canadensis 



b. Panicle contracted ; empty glumes firmer, more scabrous, less acuminate, and 

 usually closed in fruit; spikelets 3.5-5 mm. long; leaves involute in drying. 



3. C. hyperborea 



1. C. perplexa Scribn. (Dcyenxia Porteri of Cayuga Fl.) 



Dry rocky woods, on subneutral sandstone residual soils; very rare. July-Aug. 



N. w. crest and slope of Thatcher Pinnacles, Danby (D. !). 



Reported elsewhere only from Piscataquis Co., Maine, but an inspection of that 

 plant shows it to be not the same, and more like an offshoot of C. Pickeringii. The 

 Danby plant is related to C. Porieri. (For notes on the Danby plant, see Cayuga Fl. ; 

 Rept. N. Y. State Mus. 41:58. 1888; U. S. Dept. Agr., Agrost, Bui. 11:26. 1898; 

 and U. S. Dept. Agr., Agrost., Circ. 30:7. 1901.) 



2. C. canadensis (Michx.) Beauv. (Deyenxia canadensis of Cayuga Fl.) Blue 



Joint. 

 Meadows and marshes, in mucky soils ; common. June 20-July. 

 Newf. to B. C, southw. to N. C, N. Mex., and Calif., including the Atlantic 

 Coastal Plain. 



3. C. hyperborea Lange. 



Marl meadows; rare. July-Aug. 15. 



Lowery Ponds, 1917 and 1919. 



Newf. to B. C, southw. to Me., N. H., cent. N. Y., Mich., Ariz., and Wash. 



The occurrence of this species here is peculiar, extending as it does the previously 

 known range so far to the southward and so near to the type locality of C. inexpansa 

 Gray (C. con finis of various authors) at Penn Yan, a species which has been found 

 only doubtfully elsewhere. Other stations for C. inexpansa, especially those west- 

 ward, are apparently not to be referred to typical C. inexpansa. 



23. Agrostis L. 



a. Palet half the length of the flowering glume or longer ; panicle dense or open. 

 b. Ligule of the upper leaves 2-6 mm. long ; spikelets dull and pale, or dull purple ; 

 panicle dense, or, if open, with many spikelets near the rhachis ; plant pale, 

 more or less glaucous. 



