PANICE.E. 131 



A stout annual, 30-100 cm. liigh. Culms sparingly brancheiU 

 and tliese. as well as the sheaths, clothed with stiff hairs coming 

 each from a prominent tubercle. Sheaths mostly longer than the 

 internodes, rather loose; ligule a ciliate ring; blades more or less 

 hirsute, flat, cordate, 30-40 cm. long, 2-3.5 cm. wide. I'aniclB 

 usually included at the base, obovoid, '20—40 cm. long, rays very 

 numerous, rather stiff, mostly single, branching freely and bearing 

 an immense number of spikelets. The pedicels of the spikelets 1-7 

 mm. long. Spikelets linear-oval, 3,2-3.5 mm. long, first glume 

 ovate, 2.2 mm. long, 5-nerved, second and third equal, O-ll-nerved. 

 fourth or palea of the neutral floret 1 mm. long; fertile floret oval, 

 2.2-2.5 mm. long, Horal glume T-nerved. 



The plant is more robust than that of /*. capiUare; the spike- 

 lets are larger, first glume longer and 5-nerved, instead of 1-nerved, 

 second and third glumes (»-ll -nerved. 



Mexico (Sonora) and Lower California, Palmer, 



Seeds sown in wet places to raise grain, which is used by the 

 Cocoi)a Indians. 



47. P. bulbosum \L li. K. Nov. fien. et Sp. 1: 0.0 (1815). 



(!ulms !»()-120 cm. high, glabrous, erect, flattened, from a 

 perennial bulbous base. Hlades flat, scabrous or pilose, 30-40 cm. 

 long, 2-5 mm. wide. Panicle exserted, com]>ound, spreading, 

 20-40 cm. long, tiie main rays single or two or three at a node, 

 scabrous, the ultimate branches short and scattered all along tlie 

 main branches. Spikelets usually gri'cnish. often in \y,\\\r, one of 

 which is borne by a i)edicel usually 2 mm. or longer, the other on 

 a longer pedicel, ol)lcng-linear, terete, al)out 4 mm. long: first 

 glume ovate, acute, 3-5-nerved, over half as long as the spikelet, 

 secontl 5-7-nerved; floral ghune and jieuter spikelet reaching 

 beyond the second glume, 5-nerved. its ])alea shorter, 3-nerved; 

 fertile floret soft, ovate-lanceolate, 3.5 mm. long. 



Mexico, Pahncr-iO:^: Texas, Xealh't/. 



Texas, New Mexico, Arizona and Mexico. 



Var. minor Vasey Contrib. V. S. Xat. Ilerl). 3:35 (1802). 

 P. maximum var. bnJbosiim Munro. Culms more slender, panicle 

 narrow, 15 cm. long; spikelets 3.5 mm. long. 



