Poa. GRAMINE.E. 3^3 



eradicate. In conimnii with many otlior grasses, tliis at tlie Nortliwrsf nftnn lia<< its panicles of a 

 Iian-lsoHie bronze color, giving it a very ilitl'crent ainiearance Ironi that usually boine by tlio 

 species. 



-t- -1- Culms tufted, without distinct running rootstocks or stolons. 



G, P. trivialis, Linn. Culms erect, from a somewhat decumbent base : leaves 

 and sheaths rouj^h ; li^'ulo oblong, acute : j.anicle with very rough and rather dis- 

 tant branches; spikelets mostly 3- (sometimes but 2-) flowered, broader above: 

 lower palet distinctly 5-nervod, webbed at base, hairy only on the mid nerve. — 

 lieichenb. Icon. Fl. Germ. t. 1G2. 



Along the Coast IJanges (Bolandcr) ; introduced. Known as IU)ugh Meadow-grass, and com- 

 mon in the Kastern States, especially in moist meadows, though regarded as less valuabh; than 

 r. prafrnxis, to which it bears a very close rescinblaTice. It is distinguished I'roni it chielly by its 

 rough sheaths, long and acute ligule, and librous roots. 



7. P. serotina, Ehrhart. Loaves narrowly linear, soft and smooth ; ligule elon- 

 gated, acute : panicle G to 10 inches long, at length somewhat nodding at apex, often 

 purplish; sjiikelets 2-4- (rarely 5-) llowered : glumes narrow: lower palet very 

 obscurely nerved, slightly webbed below. — (Jray Man. G29. P. angustifolia, 

 L'eichenb. Icon. Fl. Germ. t. IGO. P. crocafa, Michx. 



•Not reported from the State, but as it is frecpient in the IJocky Mountains and in Washington 

 Territory, it is likely to occur here. 15y some European botanists this is referred to I', pratcnsis, 

 from which the absence of running rootstocks and the character of the panicle sufficiently dis- 

 tinguish it. 



* * * Tall ; branches of the panicle solitanj or in pairs. 



8. P, Stenantha, Trin. Culms 1 to 2 feet high : radical leaves narrowly linear; 

 cidm leaves distant, erect, Hat, 1 to 3 inches' long, between 1 and 2 lines wide, ciliate- 

 scabrous on the margin, which is somewhat cartilaginous, especially at the carinate 

 apex where it is scabrous on the keel ; ligule rounded, short : panicle 2 to G inches 

 long, rays spreading, long-naked below, few-iloweretl above ; spikelets 2-5- (even 8-) 

 ilowered ; llorets 2 to 2^ lines long, distant upon the flexuoso or zigzag very pubes- 

 cent or nearly smooth rhachis : lower palet linear-lanceolate, the edges infolded at 

 the marginal nerve which, with the keel, is ciliate-scabrous, elsewhere pubescent or 

 smooth. — Mem. Acad. St. Petersb. vi. ser. i. 37G ; Ledeb. Fl. Ross. iv. 372 ; Gray, 

 Proc. Amor. Acad. viii. 409. P. leptoc.oma, Trin. 1. c. Fesluca nervosa, Hook. Fl. 

 ]ior.-Am. ii. 251, t. 232. 



Oregon {Hall) ; Washington Territory (Pidrrhig), and northward. No specimens are known 

 to have been collected within the State, but it appears to be hwpient at tlie north. The sjiikclets 

 vary much in the degree of pubescence as they do in the number of the llowers. The infolding 

 of the lower palet at tiie marginal nerves gives the llorets an eipiilateral apjiearanee that is quite 

 characteristic. In none of tlie specimens at hand, from Oregon, etc., are the llorets woolly at 

 base, as described for P. Icpfoannn, Trin. 



9. P. glumaris, Trin. 1. c. 379. Culms stout, strict, 1 or 2 feet high, with radi- 

 cal leaves about half as tall ; culm leaves 2 or 3 inches long, rigid, striate-nerved, 

 very minutely scabrous, about 2 lines wide ; ligule short, auricled : panicle 2 to 4 

 inches long, very narrow ; rays solitary or in ])airs and unequal, one bearing 1 or 2, 

 the other 3 to 5 spikelets, smooth ; spikelets 3 - .5-llowered, membranous: glumes 5 

 as long as the llorets, smooth, broad at base, acute, eroseniargineil : lower palet acute, 

 carinate at apex, 5- or indistinctly 7-nerved, pointed 01' rarely mucronulato at apex, 

 pubcrulent throughout ; upper palet e(jual in length, broad, coar.sely ciliate on tho 

 nerves : scales as long as the ovary, lacerate and ciliate : ovary hairy aliove ; stigmas 

 nnich elongated, copiously plumose. — Ch/ceria (Arr(opofi) g/ummis, (Jriseb. in Ledeb. 

 Fl. Koss. iv. 392. /W(?) Kiugii, Watson, Hot. King Fxp. 387. 



Virginia City, Nevada (/?/r)o»)^r) ; Kast Humboldt Mountains, U'ntKon. Not <'nllecteil within 

 the State, but common northward to Sitka, ete. A most anomalous species, which Tiinius, ^^ ho 

 seems to have overlooked its ovary, scales. «-tc., referred to Pia without apparent hesitation. 

 Grisebach in Flor. Hossica placed it"in nhicrrin, hut it is so unlike the test of the genus that he 

 made a suligeuus, Aixtopon, to include it. Mr. Watson doubtfully refers it to Poa, and notes 



