TRIANDRIA, DIGYNIA. 
39 
ORDER II. DIGYNIA. 
36. Muhlenbergia, Schreber. Gen. pH03. (’ Gramineds .') 
Calix very minute, truncated, 2-valved, une- 
qual. Corolla 2-valved, hairy at the base, 
exterior valve terminating in a slender awn. 
(Style 1?) Nutt. 
1. M. culm compressed smooth branched, jointed, diffusa, 
joints smooth. Branches alternate spreading or 
erect. Leaves lineardanceolate, smooth, keeled, 
dotted, transparent- Ligula obsoletely ciliated. 
Sheath striated, pubescent at the mouth. Pani- ^ 
cle narrow divided thread-like, peduncles and 
pedicels rough. CaL 1-valved, small, lateral, 1- 
flowered, persistent. Cor* 2-valved, one of the 
valves awned, the awn terminal, purplish rough, 
a little longer than the corolla. Siam. 3^ anthers 
white, as long as the corolla. Fist. 2, styles 
white, stigmas feathery purplish. Seed oblong, 
acuminate. MuhL 
Dilepyrum minutiflorum, Mich- ^ 
Spreading Muhlenbergia* 
In dry fields not uncommon. Near the Buck-Inn, on the 
Lancaster road, abundant. Perennial. July and August. 
2. M. culm erect three feet high simple jointed, erecta# 
joints pubescent. Leaves lanceolate alternate 
nerved. Ligula short, serrated at the apex- 
Sheath decurrent, striated, smooth. Panicle nar- 
row, simple- CaL lateral, linear, l^valved, mi- 
nute. Cor. 2-valved, green, one valve 9-nerved, 
pubescent with a terminal awn, three times the 
length of the corolla ; the other smaller bifid at 
the point, grooved on the back, carinate internal- 
ly, awned at the base. Siam* 2, filaments white^ 
