= TRIANDRIA. DIGYNIA. 77 
ered, valves linear, subulate, awnless, each with a single 
nerve, larger than the flosculi; corolla valves, small, ovate, 
obtuse, smooth, the outer 3-nerved, the inner 2. Stamens 
and styles very short, purple. 
On the banks of the Missisippi, near New Orleans. 
This is probably the Eleusine mucronata of Mr. Elliott; 
: but he remarks that the glumes of the corolla are hairy, 
and the stipules bearded, neither of which particulars ap- 
pear to exist in the present plant. As the valves of the ca- 
lix are not mucronate it cannot but be improper to apply 
“i Michaux’s name to this species, which may be probably 
distinct. To this genus belongs the Eleusine filiformis of 
Persoon, growing in the tropical regions of America, and 
nearly allied to the present species, having also the same 
kind of glandular pubescence, and we may probably add 
the Eleusine virgata of Jamaica. - 
109. CHLORIS. Swartz. 
Flowers polygamous. Spikes digitate, uni- 
_lateral._—Calix 2-valved, 2 to 4-flowered; valves 
carinate, with er without an awn; (flowers dis- 
Similar, the aboriive florets pedicellate.) 
: The habit of this genus is similar to Eleusine, but the | 
fertile flowers, particularly in C. petrea are coriaceous, 
and gibbously carinated, so as to appear transversely seat- 
ed in the calix; the flower glumes when in seed, greatly — 
exceed the calix in length, and are of a dark brown co- 
lour, the hermaphrodite terminated by a short cusp, the — 
neuter or male flower being inflated and obtuse, likethe — 
rudiment in Melica; the outer valve of the calix from its — 
emargination, has a cuneate obcordate appearance, with — 
the middle nerve terminated by a short awn; the seed is’ 
naked, triquetrous, and smooth. . : 
Species. 1. € petrea. 2. mucronata. In this species 
the flowers are also transversely seated in the calix, but 
not distinetly coriaceous; the seed is very unequally 3- 
sided, scubrous, naked, and compressed. This structure 
of the seed appears to indicate some atfinity to Eleusine 
- Indica, but the habit is widely distinct. eg se 
110. ATHEROPOGON. Muhlenberg. 
Flowers polygamous, in unilateral spikes.— 
' 
| 
4 
Calix 2-yalved, 2-flowered, inner valve almost 
setifurm. Hermaphrodite corolla 2-val 
= 
