398 POACEiE. 



about 10 mm. long, besides the short awn, second incurved, lanceo- 

 late, 4-6 mm. long; floral glume incurved, 1-nerved, hispid on 

 the keel, obtuse, retuse or bifid, G-8 mm. long; palea ovate-lunceo- 

 late, obtuse, 2-nerved. 



" Certainly distinct from the next (<S'. pohjstachija), to which in 

 strictness the Linnajun name belongs." A. Gray, Man. Ed. 1: 586 

 (1848). "The characters based u])on the spikelets alone are not 

 suflicient to separate them." Scribn. liuU. Torr. Club, 10: 85 

 (1883). See illustrated article in which Scribn gives reasons for 

 his conclusions. Prof. S. considers ^S*. 2)oIy.sf(trI/>/(f only a variety of 

 this si^ecies, and in my opinion his reasons are good. 



Vermont, Pringle; Kliode Island, Tireetlji for V. S. Deitt. Agri- 

 cul., 24; Canada, Foider; Michigan, CUtrh 12!»4, 1:370; Illinois, 

 BcalS^', yioutanii, Anderf^onj Colorado, Cassi/fi/; Orvgon, Ifoirell. 



Found along banks of rivers and lakes, from New England to 

 the Rocky Mountains. The hard leaves have been manufactured 

 into paper. 



Var. polystachya (Michx.) Scribn. Bull. Torr. Club, 10:86 

 (1883). Trachymtia pohjstachya Michx. Fl. Bor. Am. 1:64 

 (1803). Salt REEn-oRASS. 



Culms stout, 120-250 om. high. Blades 00 cm. or more long, 

 15-25 mm. wide. Spikes 20-50 in number, 5-10 cm. long. 

 Otherwise like aS*. cynosuroides Willd., of which it is likely only a 

 variety. See notes on the species. 



Salt or brackish marshes, near the eastern coast. 



Delaware, Canhy for Clark 1912; North Carolina, McCarthy; 

 Florida, 6V/7/.s\s 3433; Mississippi, Tracy. 



3. S. patens (Ait.) Muhl. Gram. 55 (1817). Dactylis 2^afc)is 

 Ait. Ilort. Kew. 1:104 (1789). S. juncea Ell. Bot. S. C. & Ga. 

 1:94 (1817). Trachynotia juncea Michx. Fl. Bor. Am. 1:64 

 (1803). llusii Salt-grass. 



Culms slender, 30-00 cm. high. Leaf -blades smooth, narrow, 

 rushlike, 0-16 cm. long. Spikes usually 4-5 in number, 3-5 cm. 

 long, slightly imbricated, erect or spreading, on peduncles 3 mm. 

 long or nearly sessile, rachis smooth, or hispidulous towards the apex. 

 Spikelets oblong-linear, 6-8 mm. long, empty glumes hispid-serru- 



