344 MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
10. Setaria tenacissima Schrad. ; sehult., + Mant.« 2201279. els24. 
Brazil. 
Panicum tenacissimum Nees, Agrost. Bras. 238. 1829. 
Chaetochloa tenacissima Hitche. and Chase, Contrib. U.S. Natl. 
Jalerg oy 183 SOT: 
Slender annual, mostly simple or little branched; culms erect, 1 to 2 
m tall, leaning on or clambering over other vegetation; blades flat, 
very scabrous on both surfaces and more or less pubescent, especially 
beneath, mostly 10 to 15 cm, sometimes as much as 20 cm long, 
mostly not more than 8 mm wide, tapering to a long-acuminate apex, 
rather abruptly narrowed at base; panicles somewhat nodding or 
flexuous, rather densely flow- 
ered and tapering toward the 
\ \; W, summit, somewhat interrupted 
\ NE W eS eae the base, as much as 
cm long and 1 ecm thick 
(excluding bristles), the axis 
densely pubescent and sparsely 
\N as BN | | villous with long weak hairs; 
NS im i, bristles flexuous, becoming 
| implicate, about 1 cm long, 
SN fag i scabrous, antrorsely below, 
Sy es 3 ‘ retrorsely above; spikelets 
about 1.5 mm long, often dark 
| purple; fertile lemma _ trans- 
a i || versely rugose with numerous 
Sai fine ridges (fig. 314). 
Os Brushy hillsides, Central 
America and West Indies to 
Brazil. 
Harri St. “Mrehelirde 
VAtalaye, Leonard 8053. 
eS 
4 Ke = 
Senge DomINIcaAN REPUBLIC: 
Lagunas de Cenobi, Valeur 12; 
ae aN Ekman H12768. Bonao, 
FIGURE 314.—Setaria tenacissima, X 1 (Hitchcock Ekman H 11481. 
10002, Amer. Gr. Nat. Herb. 610). P UERTO R L@on: Utuado, 
Sintenis 6498. 
TRINIDAD: Port-of-Spain, Hitchcock 10002 (Amer. Gr. Nat. Herb. 610). 
11. Setaria magna Griseb., Fl. Brit. W. Ind. 554. 1864. Jamaica, 
Purdie. GIANT BRISTLEGRASS. 
Chamaeraphis magna Beal, Grasses N. Amer. 2: 152. 1896. 
Chaetochloa magna Scribn., U.S. Dept. Agr., Div. Agrost. Bull. 4: 
39. 1897. 
Robust erect annual, usually not branched at base, sparingly 
branched above, the branches erect; culms as much as 4 m tall, rarely 
taller, and 2 cm thick at base; blades flat, scabrous, as much as 50 
cm long and 3.5 cm wide; panicles densely flowered, nodding, often 
interrupted at base, tapering at each end, as much as 40 cm long and 
3 cm. thick, those of the branches much smaller; bristles somewhat 
flexuous, 1 or 2 below each spikelet, 1 to 2 cm long; spikelets about 
2 mm long; fertile lemma smooth (fig. 315). 
