558 OACE^. 



Glyceria pendulina Laestad. Walilenb. Fl. Suec. 1088 (1824-6). 

 Toa penduU7ia J. Yalil, Fl. Dau. t. 2343 (1761). 



An erect smooth perennial, 60-70 cm. high. Sheaths half as 

 long as the culm; ligule chartaceous, 4 mm. long; blades flat, 

 acuminate, 10-17 cm. long, 3-4 mm. wide. Panicle much exsert- 

 ed, nodding, ovoid, 12 cm. long, rays in clusters of 3-5, and 2.5-3 

 cm. distant, reflexed, sparingly branching, bearing 3-4 spikelets near 

 •the apex. Spikelets oval, 4-6-flowered, 4-6 mm. long; empty 

 flumes subequal, 3-nerved, 4 mm. long, joint of rachilla smooth, 

 0.6 mm. long, floret with a few short hairs at the base; floral 

 glume broadly oval or ovate, 3-3.5 mm. long, 3-nerved, lateral 

 nerves short, the central extending to the irregularly toothed or 

 lobed apex; palea elliptical, 2-lobed, nearly 3 mm. long. 



British America (Muckelung Elver), in 1882, for U. S. De2:)t. 

 Agricul. 



3. C. mucronata (Hack.). ArctopMla mucronata Hack.; 

 Vasey, Cat. Grasses U. S. 88 (1885). 



A smooth stout grass, 15-25 cm. high. Leaves 6-8 in num- 

 Taer, crowded; ligule broad, lacerate, 2 mm. long; blades flat, 

 ^abruptly pointed, 5-12 cm. long, 6-9 mm. wide. Panicle shin- 

 ing, yellowish, open, partially included, narrow or pyramidal, 5-7 

 icm. long, rays in twos to fours, reflexed, the longest 3-7 cm. long, 

 "bearing 2-3 spikelets near the apex. Spikelets 2-flowered, joint of 

 rachilla 0.6 mm. long, smooth or very sjiariDgly hairy; empty 

 glumes subequal, 3-3.3 mm. long, soft, tliin, first ovate, 1-nerved, 

 second broader, 3-nerved; floral glume broadly oval, 3.5 mm. long, 

 .:3 mm. wide, 5-nerved, margin scarious, apex irregularly toothed 

 or torn, the central nerve extending to the tip or into a short mucro ; 

 palea broad, 1.5 mm. long. 



Point Barrow on Arctic coast, Dr. Murdoch in 1883 for U. S. 

 Dept. Agricul. 



128. (258a). DuPONTiA R. Br. Parr. Voy. App. 290 (1824). 



Sj^ikelets 2-3-flowercd in a contracted panicle, racliilla articu- 

 late above the glumes and between the florets. Empty glumes sub- 

 equal, scarious, unawned, longer than the floral glume; floral glume 



