TRIANDRIA, DIGYNIA. 
71 
Crab-grass. Crop^grass. Yard-grass. Crow-foot- 
grass. 
Very common every where on road-sides and even in 
the crevices of the bricks on our pavements in this city. Pe- 
rennial. July. 
65. Anthopogon, Nuttall, Gen.Am.pl. 81. ( Graminece.J 
I Flowers polygamous, irregularly alternating 
upon setaceous spikes disposed in a panicle. 
I — Calix 2-valved, 2-flowered, one of the 
j flowers in the form of an abortive pedicellate 
j seta, valves rigid, subulate, and unequal, 
growing to the impressed angular rachis. 
j Corolla^ hermaphrodite, 2-valved, outer 
valve terminated by a long and straight awn. 
Neutral rudiment pedicellate, of one minute 
valve going out into an awn. Seed linear- 
oblong, internally marked with a longitudi- 
nal furrow. Nutt. 
In, A. calm 18 inches to 2 feet high, decumbent at Lepturoides. 
I the base, upwards assurgent and erect, leafy with 
I short and numerous articulations Leaves short, 
I ovate-lanceolate, very acute, smooth, flat. Pani- 
cle sub-verticillate ; spikes or racemes numerous 
i (20 to 30) simple, setaceous and very long ; ra- 
chis angular, scabrous. Flowers interrupted, ap- 
! proximating towards the extremities, appressed to 
the rachis. Cal. 2-valved, 2-flowered, growing to 
the rachis. Cor. hermaphrodite, 2-valved. Siam. 
3, exserted. Styles 2. Stigma plumose. Seed 
naked, linear-oblong. JVutt, 
A. ambiguum, Mich. 
A sin^^ular and pretty grass, for specimens of which I am 
indebted to Mr. Nuttall, not having met with it myself. In 
the woods of Jersey a mile or two from the Delaware. Mr. 
Nuttall. Perennial. 
