AGROSTIDE^. 279 



5-8 cm. long, 4-7 mm. or more broad, dense, obtuse, soft, pale 

 green. Spikelets 5-6 mm. long; empty glumes membranous, ciliate 

 on the keel only, ovate-lanceolate, connate at the base; floral glume 

 ciliate, as long as the empty glumes, awn near the base and project- 

 ing half its length. Anthers 3.5 mm. long. 



Massachusetts, BaUeii ; Pennsylvania, Clarh 2947; Oregon, 

 Hotcell ; Michigan, BealbH. 



Found in Europe, northern Africa, western Asia; introduced 

 into America. Much cultivated in cool moist climates. For a 

 popular account see Vol. 1, p. 152, Fig. 72. 



6. A. Californicus Vasey, Bull. Torr. Club, 15:13 (1880). 

 Culms more or less geniculate, 30-50 cm. high. Leaves of the 

 culm 5-6, sheaths over half as long as the internodes, the upper con- 

 siderably inflated; ligule obtuse, 3 mm. long, blades scabrid, the 

 upper 3-6 cm. long, 3-4 mm. wide. Spike exserted, 2-4 cm. long, 

 5-8 mm. wide. Spikelets oval, empty glumes ciliate, very slightly 

 united below, elliptical when spread, about 3.5 mm. long; floral 

 glume elliptical before opening, united for half its length, 2.8 mm. 

 long, awn attached one-third the way from the base, and projecting 

 about 4 mm. 



California. Dr. J. M. Bigelow, Bolander, Dr. C. L. Anderso7i. 

 7. A. occidentalis Scribn. Coult. Bot. Gaz. 11:170 (1886). A. 

 prate nsis alpestris Wahl. Fl. Lapp. 21 (1812). 



A glaucous erect grass, 30-60-90 cm. high. Sheaths much 

 shorter than the internodes, loose, but not inflated; ligule 1-2 mm. 

 long; blades flat, except near the tips, 5-15 cm. long, 4-7 mm. wide. 

 Spikelike panicle 2-3 cm. long, 10-15 mm. broad. Spikelets 3.5-4 

 mm. long; empty glumes subequal, tinged with purple and red, 

 ciliate on all the nerves; floral glume nearly as long as the empty 

 glumes, the margins connate to near the middle, delicately 5-7- 

 nerved, awn about 6 mm. long. Anthers 2.5 mm. long. 



Professor Scribner says: "It difl'ers from A. pratensis in its 

 shorter and more ovoid spikes, more heavy, less conspicuously 

 nerved and shorter empty glumes, in tlie shorter and more obtuse 

 flowering glume.^' This closely resembles A. arundineceus Poir. 

 Montana, Williams 835. 



