The Flora of the Cayuga Lake Basin 87 



la. P. capillare L., var. occidentale Rydb. (See Rhodora 21: 110. 1919.) 



Gravelly waste places and sandy or gravelly shores ; common. 



Spencer Lake ; Enfield Glen ; C. U. campus ; Ithaca flats ; Howland Island ; 

 especially characteristic along the shores of Cayuga Lake. 



P. E. I. and Que. to B. C, southw. to Conn., Mich., Mo., and westw. 



Very variable in size of spikelets. 



2. P. flexile (Gat.) Scribn. 



Marl meadows, moors, and shores ; rare. Aug.-Sept. 



Moor e. side of Lowery Ponds, 1922 (W . C. Muenscher & K. M. W.). 



Ont. to S. Dak., southw. to Fla. and Tex. ; rare or absent on the Coastal Plain. 



[P. philadelphicum Bernh. 



Found in 1914 near the farm-crops plots on the Agricultural College farm (F. P. 

 Metcalf & H. A. S every) ; probably sporadic. 

 Conn, and s. N. Y. to Ga., Miss., and Okla.] 



3. P. Tuckermani Fernald. (See Rhodora 21: 112. 1919.) 



Sandy or gravelly shores and springy places, and on silty bottom lands, with 

 little reference to lime content of the soil ; infrequent. Aug.-Sept. 



Spencer Lake ; Fall Creek, above Forest Home ; Ithaca flats, in Renwick woods and 

 w. of the Inlet ; Slayton Pond. 



Que. and Me. to Wis., southw. to Conn, and N. Y., including the northern Coastal 

 Plain. 



4. P. Gattingeri Nash. 



Rich gravelly or loamy cultivated fields, roadsides, and waste places, if not too 

 dry ; locally common. Aug. 20-Sept. 



This and P. capillare are distinctly weeds of cultivated grounds. P. Gattingeri, 

 however, occurs also on gravel bars in Fall Creek above and below Forest Home, and 

 along Salmon Creek. Collections of P. Gattingeri in this flora are all from the 

 Cayuga Lake Valley, and mostly from the vicinity of Ithaca. 



N. Y. to Iowa, southw. to N. C, Tenn., and Mo. 



5. P. miliaceum L. Broom-corn Millet. Proso. 

 Waste places, occasionally spontaneous. July-Aug. 

 Frequent on garbage dumps, where it springs from birdseed. 

 Me. to Ont., Pa., and Nebr. Adventive from Eu. 



6. P. dichotomiflorum Michx. (P. proliferum of Cayuga Fl.) 



Waste ground and cultivated fields, mostly within the influence of saline conditions ; 

 rare. July-Oct. 



Cascadilla Creek, near Willow Ave., Ithaca, 1921 {A. J. E., C. L. Wilson, & S. H. 

 Burnham) ; railroad yards w. of the Inlet, 1923 (W. C. Muenscher); "fields near 

 the Salt Creek, Montezuma" (£>.!). Introduced at the first two stations; probably 

 native at the last-named station. 



N. S. to Nebr., southw. to Fla. and Tex., including the Coastal Plain ; also in 

 Calif., Mex., W. I., and S. A. 



7. P. virgatum L. Switch Grass. 



Gravelly, rather dry, but not acid soils ; rare. Aug.-Sept. 



Appearing as though introduced: scrubby plain s. of Potter Falls, Six Mile 

 Creek, 1915 (F. P. Metcalf and C. C. Thomas) ; meadow between Willow Ave. and 

 Mill St., Ithaca, 1916 (F. P. Metcalf). The earliest records are "Farley's Point, a 

 single cluster, 1881. 'Cayuga Marshes,' (Sartwell, in Panic's Cat.)" (D.) ; but 

 whether these plants were of the typical form or the variety is not known. 



