112 PAN1CACE.E. 



Spikelets in pairs on unequal pedicels, linear-lanceolate, 4 mm. 

 long, clothed with numerous soft white or brewn hairs, as long as 

 the spikelet, first glume minute, second lanceolate, 3-nerved, nearly 

 as long as the spikelet, third glume ovate-lanceolate, 5-nerved ; no 

 palea ; fertile floret smooth, brown, ovate-lanceolate, mucronate, 

 3.5 mm. long. 



Florida, U. S. Bept. Agricuh Xo. 80 from Curtiss; Texas, 

 NeaUey. 



8. P. lachnanthum A. Gray, Pacif. Rail. Rep. 7: 21 (1857). 

 Culms rather slender, 60-90 cm. high. Leaf-blades numerous 



below, scabrid, 7-15 cm. long, 2-4 mm. wide. Panicle slender, 

 contracted, 15-20 cm. long, the branches fewer and shorter than 

 in the preceding. Spikelets in pairs, oval-lanceolate, 3 mm. long. 

 In other respects much like P. Janatnin H. & K. 



Mexico, Pringh 378 ; Arizona, Pringle; California, Palmer 

 348. 



9. P. tenerrimum Kunth, Rev. Gram. 1:39 (1829). Trichachne- 

 tenuis Nees, Agrost. Bras. 89 (1829). 



A very slender erect perennial, 30-60 cm. high, sparingly 

 branched at the base. Leaves of the culm 8-12, sparingly hairy, 

 on sterile shoots and the culms alike. Sheaths longer than the 

 internodes ; ligule a mere ring ; blades flat, erect, rather abruptly 

 pointed, 3-4 cm. long, 1.5-2.5 mm. wide, the upper 5-10 cm. 

 long. Spikes 1-3 cm. long, rays 3-6, single, slender, flower- 

 bearing for the whole length. Spikelets narrowly elliptical, 2.3-2.6 

 mm. long, clothed with appressed hairs, first glume minute, second 

 and third equal, the former 3-nerved, the latter 5-nerved, floret 

 ])rown. nearly as long as the longest glumes. 



Texas (Pecor County and Del Rio), Nedlley for \J . S. Nat. Mus. 

 in 1892, the only localities known in North America. Also found 

 in Brazil. 



10. P. platyphyllum Munro, Wright, in Sauv, Fl. Cub. 197 

 (1873). 



Culms decumbent, branching, 30-60 cm. high. Leaf-blades 

 and sheaths pale green, firm, smooth or nearly so, blades flat, 

 broad at the base, 6-10 cm. long, 5-8. cm. wide. Spikes 3-7, 



