TRIANDRIA, DIGYNIA. 
6 
Brizavirens? Walter. Flor. Car. 79. 
Closely allied to the JEra^^rostis, ( Poa megastachyat ) but 
readily distinguished by its unbranched weak, and compres- 
sed stem, the length of its leaves, which are not involute and 
rigid, the scattered few-flowered panicle, and particularly the 
obtuse points of the flower glumes, and lastly by the calix, in 
which the larger valve is 3 -nerved, and consequently similar 
to the corolla, while the calix glumes of the Poa megastachya 
have each but a single nerve, a character which not only dis- 
tinguishes it well from the present species, but also from the 
P, Eragrosiisi in which the larger valve of the calix is also 
3-nerved, similar to the corolla. Nuttall. 
P. obtusa, Nutt. 
I detected this plant in the neighbourhood of this city two 
years ago, and gave specimens to Mr. Nuttall, who has de- 
scribed it as above. I have changed his specific name, be- 
cause it was previously given by Muhl. to No. 12. July- 
56. Briza, Gen.pl. 115. f Gramineae • J 
Calix 2-valved, many-flowered. Spikelets dis- 
tichous, valves ventricose, cordate, obtuse ; 
interior valve minute. Nutt. 
1. B-culm geniculate, jointed. Leaves lanceolate eragrosta 
nerved alternate, scabrous on the margin, some- 
times hairy. Ligula white, beard-form. Sheath 
striate, neck hairy. Panicle spreading. Lower 
branches of the panicle solitary, upper ones in 
pairs and threes, hairy in the axil. Spikelets 
ovate-lanceolate pedicellate. Cal. 2-valved, 12 — 
20"flo,wered. Cor. 2-valved, valves striate trans- 
parent unequal ; the interior less, pubescent. MuhL 
B. Canadensis of Mich, according to Swartz. 
Poa megastachya. 
Poa Caroliniana, Walt. ? 
The spikelets of a leaden, or bluish-green colour. In Jer- 
sey very common ^in the sandy roads. Annual. July, Au- 
gust. 
2. B. culm erect glabrous ; leaves long, scabrous on canaiieiisis. 
the back. Spikelets ovate erect. Cal 2-valved 
lanceolate less than the corolla 7-flowered unequal 
small. Cor. 2-valved the exterior ovate acute 5- 
