GBAMINEAE (GRASS FAMILY) 73 



Culms 5-10 dm. high, scabrous below the panicle: sheaths and leaves scabrous, 

 very narrow and folded when dry; the radical 15-25 cm. long; the upper'3-6 

 cm. long; ligule scabrous, about 4 mm. long: panicle narrow, dense, 10-15 cm. 

 Jong; branches 2 or more at each node, the lower often 4-5 cm. long and 

 branched: spikelets 3-8-flowered, 6-8 mm. long: glumes scabrous, subequal, 

 obtuse or subacute, 3-nerved; lemma shorter, scarious margined above, -the 

 nerves obscure; palet ciliate on the keels, scabrous between them. — Not in- 

 frequent, especially in the western part of our range. 



23. Poa lucida Vasey, 1. c. 274. Cuhns 6-8 dm. tall, erect, the innovations 

 2-3 dm. long: sheaths smooth and glabrous; leaves of the culms 1 c^m.ior less 

 long, those on the innovations much longer: panicle 1-2 dm. long, its larger 

 fwranches 3-5, cm. long: spikelets 6-10 mm. long, 4-&-flpwe!red: the, lemmas 

 about 4.5 mm. long, appressed-pubescent below with, long hairs, obtuse or 

 acutish., {P. planifolia S. & W. I. c. 3.)^Moist hillsides and meadows; Mon- 

 tana to Colorado and Nebraska. 



,,.24. Poa Buckleyana Nash, Bull. Torr. Bot. Club 22: 465. 1895. Cuhns 

 1,5-4 dm. tall, rarely taller, erect, rigid: ligule 4-6 mm. long, acute; leaves 

 2.5-10 cm. long, about 2 laia. wide, erect, flat,. becoming involute, smooth or 

 rough: panicle 2.5-10 cm. in length, contracted, the branches. ereiEt,,3.75 cm. 

 long or less, spikelet-bearing nearly to the base: spikelets 2r5-flowered, 4-6 

 nim. long:, lemmas about 4 mm. long, obtuse or acutish,, appressed-pubescent 

 below with long hairs. P.tenuifolia. [P. ^raciMiwa.Vasey (?), Contrib, Nat. 

 Herb. 1: 272. 1893; P. Sandbergii Vasey, 1. c.,276.] — ^Very common in our 

 ,range, and westward to California. ,, 



25. Poa Sheldonii Vasey, Contrib. Nat. Herb. 1: 276. 1893. Cuhns 3-6 dm. 

 tall, erect; rigid: sheaths usually overlapping; hguje 2r-4 mm. long; >cute; 

 leaves smooth beneath, rough^above, 1-2, mm. widCj.flat or folded, piingently 

 pointed, those of the culm 1.25-2.5 cm. long, erect, the basal leaves 7.5-16'.e'm. 

 long: panicle contracted, 5-12.5 cm. in length, theibranches erect, spikelet- 

 bearing nearly to the base, 3.75 cm. long or less: spikelets 4-7-flowered, 5-7 

 mm. long: lemmas 3-4 mm. long, erose-truncate at apex, strongly silky- 



fubescent on the nerves for half their length, the lower part veipy pubescent 

 etween the nerves; intermediate nerves very obscure. (.P. arida Vasey, 1. c. 

 270, name untenable; P. pratericola Rydb. & Nash, Mem, N. Y. Bot. Card. 

 1: 51. 1900; P. juncifolia Scribn. Bull. U,S. Dept. Agr. Div. Agrost. 11: 52. 

 1898, seems to be only the large fornix of the species.); — Common and varying 

 greatly imder the extremely variable environments found withia our range. 



66. GRAPHEPHORUM Desvl 



Slender erect grasses, with flat leaves and a usually contracted ■ nodding 



Eanicle. Spikelets 2-4-flowered, flattened, the rachilla hirsute and extending 

 eyond the flowers. Glumes somewhat shorter than the lemmas, thin- 

 membranous, acute, keeled: lemmas membranous, obscurely nerved, entire, 

 sometimes short-awned just below the apex. Stamens 3. Styles distinct; 

 stigmas plumose. Grain glabrous. 



1. Graphephorum Wolfli Vasey, Defee. Cat. Gr. U. S. 55. 1885. Culms 

 erect 3-6 dm. high: leaves scabrous, flat, 15-20 cm. long: panicle upright, 

 subspicate, 6-15 cm. long: spikelets 2-3-flowered, purplish: glumes subecjtial, 

 5-6 mm. long, the first 1-nerved, the second 3-nerved; lenima nearly as long, 

 faintly 5-nerved, bearing an awn 1 mm. or less long; palet usually shorter than 

 its lemma: grain Unear-oblong. G. melicoides, as to our range. — Colorado, 

 Utah, Wyoming, and northward. 



57. GLYCERIA R. Br. Manna Grass 



Rather coarse broad-'leaved grasses, the florets early deciduous. Spikelets 

 4-15-flowered slightly compressed, linear or oblong, smboth or slightly hispid, 

 awnless, in narrow or open spreading panicles. Glumes unequal, persistent, 



