PANICE.E. 181 



A stout annual, 30-100 cm. high. Culms sparingly branched, 

 and these, as well as the sheaths, clothed with stiff hairs coming 

 each from a i^rominent 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. Panicle 

 usually included at the base, obovoid, 30-40 cm. long, rays very 

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

 an immense number of spikelets. The pedicels of the S23ikelets 1-7 

 mm. long. Spikelets linear-oval, 3.2-3.5 mm. long, first gluma 

 ovate, 2.2 mm. long, 5-nerved, second and third equal, 9-11- nerved, 

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

 2.2-2.5 mm. long, floral glume 7-nerved. 



The plant is more robust tlian that of F. capillare; the spike- 

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

 second and third glumes 9-11-nerved. 



Mexico (Sonora) and Lower California, Palmer. 



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

 Cocopa Indians. 



47. P. bulbosum II. B. K. Nov. Gen. et Sp. 1: 99 (1815). 



Culms 90-120 cm. high, glabrous, erect, flattened, from a 

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

 long, 2-5 mm. Avide. Panicle exserted, compound, spreading, 

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

 scabrous, the ultimate branches short and scattered all along the 

 main branches. Spikelets usually greenish, often in pairs, one of 

 which is borne by a pedicel usually 2 mm. or longer, the other on 

 a longer pedicel, oblong-linear, terete, about 4 mm. long; first 

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

 second 5-7-nerved ; floral glume and neuter spikelet reaching 

 beyond the second glume, 5-nerved, its palea shorter, 2-nerved;, 

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



Mexico, Palmer 207'* ; Texas, NedlUy. 



Texas, New Mexico, Arizona and Mexico. 



Yar. minor Vasey Contrib. U. S. Nat. Herb. 3:35 (1892). 

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

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



