754 GRA.MINE/E PCCCINBLUA 



ing or rarely erect, 4-8 inches long, spikelets 4-T-flowered; 2-3 lines long: 

 empty glumes acute, 1 -nerved: flowering glumes about 1 line long, obtuse 

 or rounded at the apex, sharply and distinctly 7-nerved, the furrows 

 between the nerves evident. In wet soil, Alaska to California and Neb. 



43 PUCCINELLIA Parl. Fl. Ital. i, 366. 



Perennial grasses with flat or involute leaves and contracted 

 or open panicles. Spikelets 2-10-flowered. Two lower glumes 

 empty : obtuse or acute, unequal: flowering glumes obtuse, or 

 acute, rounded on the back, 5-nerved, the nerves very obscure or 

 almost wanting. Palets about equalling the glumes. Stamens 3. 

 Stigmas sessile, simply plumose. Grain compressed, usually 

 adhering to the palet. 



P. maritima Parl. 1. c. 370. Stems atoloniferoua, 6-24 inches high, 

 erect, or decumbent at base, smooth, simple: sheaths usually exceeding 

 the internodes: ligules %-t line long: leaves 1-5 inches long, 1 line wide 

 or less, flat to involute: panicle 2-6 inches long, open, its branches ascend- 

 ing or rarely erect, 1-2 inches long: spikelets 3-10-flowered,3-7 lines long: 

 empty glumes unequal, the first usually 1-nerved, the second 3-nerved: 

 flowering glumes l>-2 lines long, obtuse or truncate. In salt marshes 

 along the coast. 



P. angustata Nash Bull. IJorr. Bot. Club xxix, 513. Poa angustata 

 R. Br. Stems erect, 4-12 inches high, simple; sheaths usually longer 

 than the internodes: ligules 1 line long: leaves 3f-3 inches long, 1 line 

 wide or less: panicle 1-2 inches long, contracted, its branches short and 

 erect or appressed: spikelets 2-7-flowered, 3-4 lines long: empty glumes 

 obtuse or rounded at the apex, the first 1-nerved, the second 3-nerved: 

 flowering glume 1%-1% lines long, usually purplish, rounded at the mpex. 

 In salt marches along the coast, Oregon to Alaska, and Labrador to Maine: 

 also Europe and Asia. 



P. tlistans Parl. 1. c. 367. Glyceria distans Wahl. Stems 1-2 feet 

 high, erect or sometimes decumbent at base, tufted: sheaths often shorter 

 than the internodes, glabrous: ligules )-! line long: leaves 1-6 inches 

 long, 1-2 lines wide, flat or folded, usually stiff and erect, smooth beneath: 

 panicle 2-7 inches long, open, rarely contracted, its branches spreading 

 or ascending, whorled, the lower 1-4 inches long, sometimes reflexed: 

 spikelets crowded, 3-6 flowered, l%-2% lines long: empty glumes obtuse 

 or acute, 1-nerved; the second exceeding the first: flowering glumes %-\ 

 line long, obtuse, obscurely nerved. Along the coast of Washington, and 

 on the Atlantic coast from Nova Scotia to New Jersey: also in Europe. 



P. Le in mo ni Scribn. Am. Grasses ii, 276. Glyceria Lemmoni Vasey. 

 Densely cespitose, with numerous involute-setaceous radical leaves, pale 

 green and glaucous: stems slender, 4-16 inches high, smooth, simple: 

 sheaths shorter than the internodes, smooth: ligules nearly 1 line long, 

 acute: leaves setaceous, 2-4 inches long, smooth: panicle long-exserted, 

 often purplish, 1-4 inches long, open, its unequal scabrous branches 

 spreading or ascending, the lower 1-2 inches long: spikelets narrow, 

 7-f lowered, 2-3 lines long; first glume less than a line long; the second 

 about twice as long: flowering glumes about a line long, abruptly pointed. 

 In alkaline meadows: eastern Oregon to California and Brit. Columbia. 



44 PLEUROPOGON R. Br. App. Parry Voy. 286. 

 Perennial grasses with flat leaves and rather few spikelets in 



