24 MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
1. Bcepiechaets spicata Schrad.; Nees, Agrost. Bras. 537. 1829. 
Brazil. 
Lepideilema lancifolium Trin., Mém. Acad. St. Pétersb. VI. Math. 
Phys. Nat. 1:98. 1830. Brazil. 
Perennial; culms erect or ascending at base in 
small tufts about 1 m tall; blades flat, lanceolate 
or elliptic, rather thin, scabrous or glabrous, veins 
connected by transverse veinlets on under side, 
hispidulous on the collar, 6 to 15 em long, 1.5 to 
6 cm wide; spike erect, 7 to 20 cm long, the rachis 
angled, flexuous or zigzag at the insertion of the 
spikelets; spikelets 6 to 20, solitary at each node, 
appressed to the rachis, overlapping about half 
their length, 2 to 3 cm long, about 2 mm thick at 
the base, gradually narrowed upward (fig. 4). 
Wet forests at low altitudes, Trinidad and Pan- 
ama, to Brazil. 
TriInipDAD: Caparo Forests, Broadway 4929. 
TRIBE 2. FESTUCEAE 
7. BROMUS L., Sp. PI. 76. 1753. Bromrcrass 
Spikelets several- to many-flowered, the rachilla 
disarticulating above the glumes and between the 
florets; glumes unequal, acute, the first 1- to 3- 
nerved, the second usually 3- to 5-nerved; lemmas 
convex on the back or keeled, 5- to 9-nerved, 2- 
toothed at the apex, awnless or usually awned from 
between the teeth; palea usually shorter than the 
lemma, ciliate on the keels. Annuals or perennials 
FIGURE 4,—Streptochaeta. With closed sheaths, flat blades, and open or con- 
spicata, Inflorescence, X 1; i panicle roe wiz 
Se a io ubacved panicles OL large spikelets. 
a028) Awn of lemma short or none_-_---- 3.. B. CATHARTICUS. 
Awn of lemma longer than the body. 
Awns 2 to 3 cm long; panicle branches drooping___-_-_-_-- 1. B. STERILis. 
Awns 4 to 5 cm long; panicle branches ascending.____-_---- 2. 3B. RIGIDUS. 
1. Bromus sterilis L., Sp. Pl. 77. 1753. Europe. 
Annual; culms 50 to 100 cm tall; sheaths pilose; panicle 10 to 20 cm 
long, the branches drooping;.spikelets 2.5 to 3.5 em long; lemmas 
about 2 cm long, the awns 2 to 3 cm long (fig. 5). 
FIGURE 5.—Bromus sterilis, X 1 (Boettcher 2423). 
