2. Ce rubescens Buckl. Pineerasse — >Culms erect, with rhizomes 40-120 
@ ome tall; sheaths scabrous, pubescent on the collar; ligules 2-4 mn. long; 
blades flat, rather thin, scabrousgusually attenuate to a fine involute point, 
1-5 mme, rarely as much as 5 mne wide; panicle narrow, dense, often interrupted 
at the base, 5-15 cme, usually about 10 cm., long; glumes 4-5 mm. long, 6 mm. 
in exceptional specimens, scabrous or nearly smooth, the first l-nerved, the 
second d-nerved, the lateral nerves inconspicuous; lemmas 3-4 mm. long, 
smooth, thin, faintly nerved, the tip erose, awned from near the base, the 
awn twisted below, geniculate, 1-2 mm. long above the bend, protruding side- 
ways from the glumes; rachilla produced about 1 m. 
Open woods, mountain slopes and ledges. 
Se C. Scribneri Beal. > Culms\erect or ascending|with rhizones,| 
as much as 120 cm. tall; sheaths scaberulous, sparsely pilose, rather 
densely pubescent on the collar; ligules conspicuous, 4-5 mm. long; blades 
' thin, lax, scabrous on both surfaces, as much as 25 om. long and 7 mm. wide; 
d) panicles narrow, rather dense but open, 10-15 cm. long, the branches spikelete> 
bearing from near the base; glumes acuminate, Scabrous, 4 um. long, the first 
ls, the second d-nerved; lemmas 3 mm. long, the callus hairs about half as 
long as the lemma, awned from below the middle, the awn Slender, straight, 
includeds prolongatio of the rachilla minute, the hairs short. 
Rich soil of lake shores. 
no — Lake Coeur d'Alene, cand berg et al 564—¢ ————- Sts 
4. C. canadensis (Michx.) Beauv. Bluejoint. +~—+Culms|erectefwith rhizomes, 
50 to as much as 140 om. tall; shedths smooth or scabrous, glabrous on the 
collar; ligules 4-7 mm. long; blades flat, lax, scabrous, as much as 45 om. 
lomg and 8 mm. wide, usually about 25 or 30 om. long and less than 5 m. wide; 
panicles flexuous, open, 10-20 cm. long; glumes acute or acuminate, scabrous 
at least on the keel: lemmas about 3-4 mn. long, the callus hairs as long as 
the lemma, awned fron below the middle, the arm slender, straight, included 
prolongation of the rachilla one-third as long, the hairs as long as the 
lemma « 
. 
3 
att 
f 
77, ria mn Aare Tr * 
Open woods, meadows, and wet places. 
Ce ee 
