72 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



14. Poa acutiglumis Scribn. U. S. Dept. Agr. Div. Agrost. Circ. 9: 4. 1899. 



A tufted, glabrous perennial, 50 to 70 cm. high, with rather short, narrow and soft 

 radical leaves and open, pale or purplish, ovate panicles, about 10 cm. long, the 

 scabrous, spreading, or ascending branches naked below, the lower ones 5 to 6 cm. 

 long; spikelets lanceolate, remotely 4 to 6-flowered, 8 to 11 mm. long, glumes unequal, 

 the second about 5 mm. long; lemmas about 5 mm. long, narrowly oblong-lanceolate, 

 acute, rough-hispid on the back, and with a short crisp pubescence at the base and 

 on the lower half of the nerves; palea conspicuously ciliate on the keels and sparsely 

 pubescent near the tase. 



Southeastern Alaska and southward to Oregon. 



Specimen examined: Juneau, Coville & Kearney 2517. 



The Alaska specimen cited is somewhat smaller than the type of /'. acutiglumis, 

 with slightly shorter ligule and less scabrous spikelets. It is the same as Henderson's 

 no. 9 from Oregon, in U. S. National Herbarium. 



15. Poa turneri Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 8: 5. pi. 1. 1897. 



A rather stout, glabrous, stoloniferous and apparently dioecious perennial 40 to 

 70 cm. high, with soft flat leaves and more or less spreading and nodding panicles 8 to 

 15 cm. long, of rather large, compressed 3 to 6-flowered spikelets about 9 mm. long; 

 glumes subequal, both 3-nerved, about equaling the lowest lemma, this about 7 

 mm. long, densely pilose on the keel and marginal nerves below, and with a tuft of 

 long cobwebby hairs at the base. 



Aleutian Islands and Cook Inlet, Alaska. 



Specimens examined: Atka Island, Turner 1185 (type), 1200, 1206 in part; Kasilof, 

 Evans 615. 



A species similar to Poa hispidula, but distinguished by its more open and lax pani- 

 cles, larger spikelets and longer, narrower, more acute glumes and lemmas. 



16. Poa lanata sp. nov. Plate 1(5. 

 A slender, erect perennial 25 to 40 cm. high, from creeping rootstocks, with narrow, 



linear, rigid leaves and open, rather few-flowered panicles 5 to 7 cm. long; sheaths 

 rather loose, the lower ones imbricate and marcescent, decidedly scabrous, or the 

 upper one nearly smooth; ligule about 4 mm. long, hyaline, obtuse, and generally 

 somewhat lacerate; basal leaves and those of the innovations 6 to 12 mm. long, 2 to 4 

 mm. wide, glaucous, glabrous except on the scabrous margin, folded or involute, 

 acute and hooded at the apex, the culm leaves generally but one, shorter; panicle 

 somewhat exserted, pyramidal, lax; branches mostly in pairs, spreading, the lower 

 ones 2 to 3 cm. long, naked below, bearing from 1 to 3 spikelets near the apex; pedicels 

 scabrous, spikelets ovate, acute, purple, compressed, 8 to 10 mm. long, 3 to 6-flowered; 

 first glume 5.5 mm. long; second glume 6 to 6.5 mm. long, both acute, 3-nerved, 

 scabrous on the keel, minutely and sparingly strigose throughout; lemmas 6 to 7 mm. 

 long, purple, with broad hyaline margins, 5-nerved, obtuse, densely webby hairy in 

 the lower half, strigose above, scabrous on the keel; palea nearly equaling the glume. 



Type U. S. National Herbarium no. 376421, collected July 17, 1899, Aleutian Islands, 

 by Coville & Kearney (no. 2191). 



Specimens examined: Unalaska, Piper 4764, 4752, 4755, 4758; Aleutian Islands, 

 Coville & Kearney 2191. Differs from Poa cenisia All. and Poa arctica R. Br. in the 

 characters of its leaves and sheaths, and in the larger and more densely pubescent 

 lemmas. Apparently closely related to Poa gclida Roem. & Schult. from Greenland, 

 so far as can be determined from the description of that species, but differs in certain 

 sheath, panicle, and spikelet characters. 



Explanation of Plate lti. a, Plant; 6, glumes; c, three florets of a spikelet. a, Natural size; b, 

 scale about 5; c, scale about 4. Drawn from I lie 1ype specimen. 



