ANDKUI'UUONE.E. 49 



long, dense, reddish green ; joint ciineate, a third shorter than the 

 spikelets, with white spreading hairs on the edges, the apex 1 mm. 

 wide. Sessile spikelets whitish, 4-5 mm. long; first glume linear- 

 oblong, obtuse, 2-toothed; margins firm, involute, hairy; second 

 glume as long as the first, obovate-truncate, compressed, ciliate, 

 bearing an awn 3-4 times its length between the two very sliort 

 teeth; third linear, the oblong margins involute, ciliate; fourth 

 elliptical, half as long as the second, ciliate, the awn 3.5-4.5 cm. 

 long; palea one third shorter than its glume. Anthers 1. 8mm. 

 long. Pedicellate spikelets twice as long as the fertile ones, tinged 

 with red; first glume herbaceous, obovate-falcate, flattish, abruptly 

 acute, with 15 or more nerves, ciliate, bearing a slender awn its own 

 length ; second glume half as long as the first, ovate-lanceolate, with 

 a slender awn half its length or longer. Stamens 0. 



Mexico, Palmer 2320, Pringle-, Cuba, Wright 3483. 



Found in Mexico, Cuba, Central America to Brazil, tropical 

 Africa, India. 



11. A. brachystachyus Chapm. Fl. S. States, Suppl. 608 (1889). 

 Culms 100-150 cm. high, with numerous very slender branches, 



each bearing two short spikes. Leaf-blades smooth, the lower 30 

 cm. long, 3 mm. wide, the upper reduced to mere short threads. 

 Spikes mostly in pairs, slender, zigzag, 1-2 cm. long, the hairs of the 

 rachis and pedicels extending beyond the spikelets. First glume of 

 the sessile spikelet lanceolate, 2-keeled. 2-nerved, 4 mm. long; 

 second rarely as long, compressed, 1-nerved; third shorter, hyaline; 

 fourth very narrow, bearing a twisted awn 1 cm. long. Pedicels 

 bearing no spikelet. 



Florida, Cnrtiss 3632. 



12. A. arctatus Chapm. Coult. Bot. Gaz. 3 : 20 (1878). 



An erect, smooth perennial, branching above the middle. 

 Culms hard, cylindrical. Sheaths shorter than the internodes; 

 blades 10-15 cm. long, 2-3 mm. wide, often involute. Spikes in 

 pairs, 2-4 cm. long, the terminal pair barely exserted, the lateral 

 with its base enclosed by a sheath, the tip of which seldom reaches the 

 apex of the spikes; rachis and pedicels clothed with soft white hairs 

 extending beyond the spikelets. Sessile spikelet lanceolate, 5 mm. 



