158 PANICAOE^:. 



Culms slender, erect, flattened and branching below, 60-90 cm. 

 high, from creeping rootstocks; nodes glabrous. Leaf-bludes 

 scabrous, twisted, flat, some of tlie largest 20 cm. long, 4 mm. wide, 

 having a very long slender apex. Panicle cylindrical, pale green, 

 interrupted, 15-*20 cm. long, 7 mm. diam., maii\ axis pilose, bris- 

 tles 1-3 to the spikelet, the asperities pointing upwards, some of 

 them as long as the spikelets, otliers 10 mm. long, with all grades 

 between. Spikelets oblong, moderately acute, nearly 3 mm. long, 

 first glume broad, nearly half the length of the spikelet, 3-uerved, 

 second glume and floral glume of the neuter spikelet ef[ual, 5-7- 

 nerved: }ialea small; fertile floret acute, finely transversely 

 wrinkled. A good forage grass. 



Arizona. Pritujh', Lower California and Mexico, Palmer 340. 



New Mexico, Texas, and Arizona; also West Indies, Brazil, and 

 East Indies. 



Var. pauciflora Vasey, ined. 



Much moi'o slender. 30-40 cm. high, blades thinner, nearly 

 smootli. 10 cm. long, 8-10 nun. wide; panicle more interru])ted, 

 some of the lower branches 1 cm. long. 



California. Palmer 1!>I. 



14. C. uniseta (Presl) Kuntze, Rev. Gen. PI. 770 (1801). Uro- 

 chJoi uniseta Presl, Peliii. Ihvnk. 1:319 (1830). Panicum nnise- 

 tum Trin. et Pupr. Mem. Acad. St. IVtersb. (VI.) /. 3:217 

 (1835). Sefariu iiniseta Fourn. Ilemsl. Biol. Centr. Am. Bot. 

 3:50(; (1880). 



Culms slender, smooth or rough, branching below, 40-70 cm. 

 high. Leaf-blades flat, twisted (?), scabrous. 10-14 cm. long, 10-15 

 mm. wide. Spikes interrupted, the larger branches 3-5 mm. long, 

 Ijristles single, finely serrulate, 10-15 nun. long. Si)ikelets oval, 

 hardly acute, 2 mm. long, first glume less than half as long as the 

 spikelet, 3-nerved, second and the floral glume of the neuter spike- 

 lot 5-nerved, the former a little the shorter; palea small; fertile 

 floret with very slight transverse ridges as seen with a lens. 



Mexico, Pr ingle 381. 



15. C. sulcata (Raddi). Setaria sulcata Raddi, Agrost. Bras. 

 50. 



