140 GRAMINEAE. 
2. Oryzopsis micrantha (Trin. & Rupr.) Thurb. Small-flowered 
Mountain Rice. (Fig. 315.) 
Urachne micrantha ‘Trin, & Rupr. Mem. Acad. St. 
Petersb. (VI.) 5:16. 1842. 
Oryzopsis micrantha Thurb. Proc. Phila. Acad. 1863: 
78. 1863. 
Culms glabrous, 1°-214° tall, erect, slender, sim- 
ple, smooth. Sheaths shorter than the internodes; 
ligule about 14’ long, truncate; leaves erect, scab- 
rous, the basal one-half the length of the culm, less 
than 14’ wide, usually more or less involute, the 
culm leaves 2/-8’ long, 14’/-1’’ broad, the larger 
attenuate into a long slender point; panicle 3/-6’ 
long, the branches finally spreading, the lower ones 
1/-2’ long, naked for about two-thirds their length ; 
spikelets 1//-14/’’ long, the outer scales about 
equal, acute, glabrous; third scale shorter, glab- 
tous, bearing an awn 3/’-4’’ long. 
South Dakota to Nebraska, New Mexico and Arizona. 
June-July. 
3. Oryzopsis asperifolia Michx. White-grained Mountain Rice. (Fig. 316.) 
Oryzopsis asperifolia Michx. Fl. Bor. Am. 1: 51. 1803. 
Urachne asperifolia Trin. Unifl. 1:174. 1824. 
Culms glabrous, 10’—20’ tall, erect, simple, smooth 
or scabrous. Sheaths 1/—2’ long, crowded at base; 
ligule very short, truncate ; leaves erect, scabrous, es- 
pecially above, the basal ones elongated, often equal- 
ling or exceeding the culm, 2’/-4’’ wide, attenuate 
into a long point, the 1 or 2culm leaves much reduced, 
less than 14’ long; panicle 2’—3’ long, contracted, the 
branches 1’ in length or less, erect ; spikelet, exclusive 
of awn, 3/’-4’’ long; outer scales glabrous, usually 
apiculate, the first somewhat shorter; third scale 
whitish, equalling the second or a little shorter, spar- 
ingly pubescent, the awn 314’/-5”’ long. 
In woods, Nova Scotia to British Columbia, south to 
New Jersey, Pennsylvania, Minnesota and in the Rocky 
Mountains to New Mexico. May-June. 
4. Oryzopsis melanocarpa Muhl. Black- 
fruited Mountain Rice. (Fig. 317.) 
Oryzopsis melanocarpa Muhl. Gram. 79. 1817. 
Urachne racemosa Trin. Unifl. 1:174. 1824. 
Glabrous, culms 1 14°-3° tall, erect, simple, roughish. 
Sheaths smooth or scabrous, the lower ones usually 
longer, the upper slightly shorter than the internodes; 
ligule very short; leaves 5’-12’ long, 2’’-7’’ wide, nar- 
rowed toward the base, acuminate at apex into a long 
slender point, scabrous especially above; panicle 
branched or nearly simple, 3/-12’ long, its branches 
2/-4’ long, spreading or ascending, the lower half 
naked; outer scales of the spikelet about equal, 
3//-4’’ in length, acute ; third scale shorter, acute, dark 
colored, sparingly pubescent, the awn $’/-12” long. 
Rocky woods, Vermont and Ontario to Minnesota, south 
to New Jersey, Kentucky and Missouri. July—Aug. 
