H46 POACE.E. 



Spikelets with t'ni})ty gluiius subcqual, about ') nun. loii<;. lanct'o- 

 lato, acuto wla'U spread, appoarin*:' k^-cli'il. lirst l-iiervcd, si'coiul 

 obscurely 3-nervc(l, rudiment 1.5 inni. long witli a ijencil-tul't still 

 longer; hairs in '2 tul'ts, 1 mm. long; lloral glume seahi'id. ovid. 

 acute. 4 mm. long, the rather slender twisted and bi'Ut awn attached 

 just below the middle and exceeding the empty glumes about •^nini; 

 l)alea lanceolate, nearly as long as its glume. 



Mexico, Pn'}i(/h' U22 in 1887, itOOO feet altitude. 



15. C. lactea (Suksdorf), Jhi/ciixid htcleit Huksdoril! in herb. 

 (1890). 



Perennial; culms stout, scabrous, 00 cm. high. Sterile shoots 

 few. Leaves scabrous; sheaths of the culm half or two-thirds us 

 long as the internodes; ligule 2-;J mm. long, decurrent; blades 

 20-130 cm. long, 5-7 mm. wide. I'aniele slightly exserted, silvery 

 green, rather thin, j)yramidal, 8-12 cm. long, rays in hall'-whorls of 

 4-0, the longest 3-5 cm. long, flower-bearing on the u])per half. 

 Spikelets with empty glumes subecpud, 5-0 nun. long, lanceolate 

 when spread, first 1-ncrved, second 3-nerved; hairs surrouiuling 

 the base of the floret numerous, 3.5 mm. long, rudiment 0.5 mm. 

 long, pencil-tufted: floral glume oval, acute, 4.3 mm. long, the 

 slender awn attached 1 mm. above the base and extending to the 

 tips of the empty glumes; palea 3.5-3 mm. long. Anthers 2 mm. 

 i jng. Nearly allied to Ih Pn'/if/Ici Scribuer. 



Washington, Suksdorf 1022; banks of tlie North Fork of 

 Kooksack IJiver. near ^loutit Baker. 



10. C. Aleutica IJong. A'eg. Ins. Sitcha 171 (1S31). Dcycnxia 

 Ahutiea^Uuwo. Hook. Trans. Linn. Soc. 23:345 (1802). 



Perennial; culms stout, erect, G0-150cm. high. Sheaths loose, 

 shorter than the long internodes; ligule ovate or truncate. 4-7 mm. 

 long; blades of the culm rather firm, scabrous, flat or involute, 

 20-40 cm. long, those of sterile shoots longer, 5-8 mm. wide. 

 Panicle much or little exserted on a scabrous peduncle, rather loose, 

 slightly interrupted, nearly acute, erect, 12-25 cm. long, 2-3 cm. 

 broad ; rays in crowded i-lusters, 4-8 cm. long, the branches bearing 

 spikelets for nearly their whole length. Spikelets pale or brownish 

 purple, elliptical-lanceolate, 5-0 mm. long, usually longer than their 



