AOIiOSTIDKiE. 341 



50 cm. long, 0.8-1.5 mm. diam. I'liniclo red, slonder, !.'5-35 cm. 

 loiip^, rays mostly scattered, capillary, sparingly branched, the long- 

 est 13-16 cm. long, bearing 15-20 spikelets on the outer half. 

 Spikelots on pedicels 3-10 mm. long; empty glumes eubequal, 

 ovate, apex variable, obscurely 1-2-aerved, about 1.2 mm. long; 

 floral glume soabrid, lance-elliptical, 4.4 mm. long, 2-toothed, the 

 awn 15-25 mm. long; palea linear, abruptly acute when spread, 

 nearly as long as its glume. Anthers 3, linear, 3 mm. long. 



Mexico, Pringle 401. 



Mexico. 



5. M. Clomena Trin. Unifl. 194 (182G). J/, nana Benth. 

 Plant, llartw. 2G2 (1846). 



A slender tufted light reddish green annual, 10-15 cm. high, 

 branching near the base. Lower sheaths inflated ; ligule about 1 

 mm. long; blades thin, scabrous above, involute, 2-5 cm. long, 1 

 mm. wide. Panicles rather dense, linear to oval, 1-2 cm. long, 

 the axis, rays, awns, and often the pedicels flexuose. Spikelets sub- 

 sessile on the rather stout rays; empty glumes soft, seabrid, first 

 ovate-lanceolate, obtuse, 1-nerved, 1.5 mm. long, second oblanceo- 

 late or obovate, truncate or 2-3-lobed or toothed, 2-3-nerved, 1.5 

 mm. long; floral glume pubescent, lance-oval, the apex with 2 lobes 

 or truncate, obscurely 3-nerved, 1.5 mm. long, the awn coming 

 from below and bacsk of the tip, 1-1. o cm. long; palea oval when 

 spread, 1.2 mm. long. Stamens 3, anthers 0.5-O.G mm. long. 

 Grain lance-oval, 1 mm. long. 



Mexico, Pringle 824, 1411. 



Thin soils. Mexico and South America. 



6. M. Bourgsei Fourn. Hemsl. Biol. Centr. Am. Bot. 3:539 

 (1880), 



A slender annual. Culms much bi'anched and leafy below, 

 naked above, 15-30 cm. high. Sheaths slightly distended; ligule 

 acute, hyaline, 3 mm. long; blades flat. 1-3 cm. long, 1 mm. or 

 less wide, very finely scabrous on the margin and minutely pubes- 

 cent on the upper side along the nerves. Panicle rather narrow, 

 3-5 cm. long; rays solitary, ascending, the lower 1.5-2.5 cm. 

 long, flower-bearing from near the base. Empty glumes unequal^ 



