ANDROPOGONEZ i 
Brot. for the first and Sorghum 
vulgare Pers. or Andropogon 
Sorghum (L.) Brot. for the 
second. 
H. halepensis L. Johnson-grass. 
Culms usually 3 to 5 feet tall, 
erect, smooth, often glaucous, pro- 
ducing strong creeping rhizomes; 
sheaths smooth; ligule membra- 
naceous, about 2 mm. long, the 
upper half a ciliate fringe; blades 
smooth or nearly so, somewhat 
scabrous on the margins, 1 to 3 feet 
long, mostly 4 to inch wide, 
tapering to a fine point, the white ny, 
midrib conspicuous; panicle open ban oy) S 
and spreading, 6 inches to 2 feet 
long, usually more or less reddish 
or purple, the branches 2 to 4 
together, naked below, pubescent 
at the base; spikelets somewhat 
crowded along the upper part of 
the branches, in pairs or the termi- 
nal in 3’s, 1 sessile and fertile and 
1 or 2 pediceled and staminate; 
fertile spikelet about 5 mm. long, 
- flattened dorsally, elliptical or ovate- 
lanceolate, indistinctly nerved, firm 
and coriaceous, at first pubes- 
cent but later becoming smooth 
Fria. 17. Holcus halepensis. Inflorescence 
and rhizomes, X 14, a terminal fertile spike- 
let with two staminate spikelets, X3. 
