416 MISC. PUBLICATION 243, U. 8. DEPT. OF AGRICULTURE 
Open ground in the vicinity of Habana, Cuba, introduced from 
eastern Mexico. 
Cusa: Vicinity of Habana, Léon 209, 300; Tracy 9086; Juzepczuk 
17. Minas, Ekman 15376. 
2. Trachypogon ligularis Nees, Agrost. Bras. 345. 1829. Brazil. 
Culms erect, 1 to 1.5 m tall, often sparingly branching below, the 
sheaths overlapping; ligule 5 to 18 mm long, firm; blades mostly 
reflexed, flat, 3 to 7 mm wide, scabrous, long-attenuate; racemes 2 
or 3, sometimes solitary, 10 to 20 cm long; awns 4 to 7 cm long, pilose. 
In the Grasses of the West Indies this 
species was referred to JT. plumosus 
Humb.and Bonpl. The type of that in the 
Paris Herbarium was examined in 1935 
and is found to be a species confined to 
South America. 
Wet savannas, Trinidad to Colombia, 
south to central Brazil. 
TrinipaD: Mount St. Benedict, Broad- 
way 5061. St. Joseph, Hitchcock 10185. 
Piarco Savanna, Hitchcock 10342. Arima, 
Eggers 1379. 
3. Trachypogon filifolius (Hack.) Hitchce., 
Contrib. U. S. Natl. Herb. 12: 191. 
1909. 
Trachypogon polymorphus var. filrfolius 
Hack., in Mart., Fl. Bras. 2°: 642. 1883. 
Brazil. 
Slender, wiry, tufted, 1 to 1.3 m tall; 
ligule 2 to 4 mm long; blades erect, invo- 
lute, slender, elongate, smooth; racemes 
solitary, 8 to 12 em long, mostly more 
slender; awns mostly not more than 5 cm 
long, sparsely pilose (fig. 366). 
Sandy pine woods, western Cuba; Brazil. 
Cuspa: Herradura, Hkman 11571; Ek- 
man in 1923. Pinar del Rio, Hitchcock 
23308: Wright 3892, 3893; Léon 3398. 
Viniales, Léon 15863. 
116. ISCHAEMUM L., Sp. PI. 1049. 1753 
SLOT oi ene EULA a Sessile spikelets perfect, awned; pedi- 
nuliorescence, ; lertlie Splkelet, : 
5 (Ekman 11571). : cellate spikelets perfect but not always 
fruitful; rachis disjointing; racemes 2 to 
several, digitate or aggregate on a short axis. Culms branching, with 
flat blades and digitate or flabellate inflorescence with slender awns. 
Racemes 2, conjugate; first glume strongly rugose across the pag 1. J. RUGOSUM. 
Racemes several in a cluster; first glume not rugose___------ . I. LATIFOLIUM. 
1. Ischaemum rugosum Salisb., Icon. Stirp. Rar. 1. pl. 1. 1791. 
India. 
Annual; culms 0.5 to 1 m tall; geniculate below; nodes bearded; 
blades 8 to 12 mm wide, sparsely pilose; racemes 5 to 10 cm long, 
