40 TRIANDRIA, MONOGYNIA. 
‘ : a ae 
__-rolla coriaceous, subcylindric-ovate, 2-valved, 
- surrounded at the base with a line of pubes- 
cence, the exterior valve awned at the summit. 
Perisporium 2-parted, linear. - 
Culm nearly leafless. Flowers rather large, in a small z= 
; racemose panicle; leaves almost rigidly erect, flat, rough, © 
- somewhat pungent at the point, and on the lower part 0 
_. the culm very short. Corolla glume a little hairy. Mic 
ehaux adds that it hasithe habitus of Oryza. 4 
Spectes. 1. O. asperifolia. The only species hitherto 
known, and confined to the northern mountains of Cana- 
- da and the United States. It appears tu be consider 
ably allied to the genus Milium, but is well distinguished 
from it by the very different form ofthe valves of the ca- 
_lyx, and the single style. Mr. Pursh remarks his having 
found it on the Broad Mountains of Pennsylvania, and 
says, that the grain it produces is large, and affordsa fine 
and abundant farina, deserving the attention of agricul- 
ee turists. es Ge? 
_ 63. * ERIOCOMA.} (Silk-grass.)~ 
_ Calix 2-valved, 1-flowered; valves gibbous 
and coarctate above, longer than the corolla, 
both 3-nerved and cuspidate. Corolla 2-valved, 
__-Foundish; valves coriaceous, vested with a silky 
wool, the outer valve terminated by a short tri- 
quetrous deciduous awn. Anthers bearded. Seed 
large, somewhat spherical. | Py 
Flowers dichotomously paniculate, peduncles flexuose, 
_ eapillary, and clavulate. Leaves very long, invyolute and 
subulate, nodes of the culm distant, entirely sheathed. Be 
- a membranacea. Pursh, vol. ii. in Supplement. p+ 
Sd. Cuspirata, C. : : — 
___ DescaiPriow, Root perennial; culm 2 to 3 feet high» 
__-stmple; panicle spreading, dichotomous, flowers by pairs, 
peduncles capillary flexuose, clavulate at the summit. 
Leaves very long, filiform and convolute, a little asperate 
~ onthe margin, (often more than a foot in length); vag 
half a foot, entirely sheathing the stem and the panicle — 
-— ¢ From c¢ tov, wool, and noun, @ head of hair. A grass pro- 
_ ducing a fastigiste tuft of silky hair, oe the glume of the — 
coroll lia : ~ : Ee - : = “= ms i ie ies eany 
~ 
