583 
GRAMINEA2. (GRASS FAMILY.) 
ing into a long thread-like point; branches of the pyramidal panicle 
smooth ; glumes lanceolate, the upper as long as the similar pale®, the 
lower £ shorter; the copious hairs more than half the length of the 
naked palea. — Sandy coast of N. Michigan, and northward.—Spike- 
lets long. Sheaths clothed with deciduous wool. 
§ 3. Ammophila, Host. — Glumes nearly equal and rather longer 
than the equal similar palea, scarious-chartaceous, lanceolate , com- 
pressed-keeled : lower palea o-nerved, slightly mucronate or obscurely 
awned near the tip; the upper 2-keeled: rudiment plumose above; 
squamuUe lanceolate , much longer than the ovary: panicle spiked- 
contracted: spikelets large (£ ; long). 
7. C. arcnaria, Trin. (Sea Sand-Reed.) Culm rigid (2°- 
3? high) from stout running rootstocks; leaves long, soon involute; 
panicle contracted into a dense cylindrical spike (5*-9' long); hairs 
only J the length of the pale©. (Arundo, L. Psamma, Beauv.) — 
Sandy sea-beach, common. August. 
12. ORYZOPSIS, Michx. Mountain Rice. 
Spikelets 1-flowered. Glumes herbaceo-membranaceous, sev- 
eral-nerved, nearly equal, commonly rather longer than the ellip¬ 
tical flower, which is deciduous at maturity with a very short 
bearded callus. Lower palea coriaceous, at length involute so 
as closely to inclose the upper (of the same length) and the ob- 
long grain ; a simple untwisted and deciduous awn jointed on its 
apex. Stamens 3. Squamul© mostly 2 , conspicuous. Styles 
sometimes united : stigmas plumose. — Perennials, with rigid 
leaves and a narrow or racemed panicle. Spikelets greenish, 
rather large. (Name composed of opv£iz, Rice , and oy/ns, likeness , 
from the resemblance to that grain.) 
* Styles united below, slender: culms tufted , naked. 
1. O. asperifolia, Michx. Culms (9' -18' high) clothed 
with sheaths bearing a mere rudimentary blade, overtopped by the 
long and rigid linear leaf from the base ; panicle very simple and ra- 
ceme-like, few-flowered; awn 2-3 times the length of the rather hairy 
whitish palea,. (Urachne, Trin.) — Hill-sides, &c ., in rich woods, 
common northward. May. — Leaves concave, keelless, rough-edged, 
pale underneath, lasting through the winter. Squamul© lanceolate, 
almost as long as the inner palea ! 
2. O. Canadensis, Torr. Culms slender (6' -15' high), the 
lowest sheaths leaf-bearing; leaves involute-thread-shaped, rigid; pan¬ 
icle contracted (l , -2Mong), the branches usually in pairs; pale© 
hairy-bearded, whitish; awn short and very deciduous, or wanting. 
