584 
GRAMINEiE. (GRASS FAMILY.) 
(O. parviflbra, Nutt. Stipa Canadensis, Poir. Milium phngens, Torr.) 
— Rocky hills and dry plains, VV. New England to Wisconsin and 
northward, rare. May. — Glumes l" - 2" long, sometimes purplish. 
* * Styles distinct , short: culm leafy to the summit. 
3. O. mclamocas’pa, Muhl. Leaves lanceolate, taper-point¬ 
ed, flat; sheaths bearded in the throat; panicle simple or sparingly 
branched, the spikelets loosely racemed ; awn thrice the length of the 
blackish palcce (nearly V long). (Milium racemosum, Smith. Pip- 
tatherum nigrum, Torr.) — Rocky woods, common northward. Aug. 
— Culm2°-3P high. 
13. STIPA, L. Feather-Grass. 
Spikelets 1-flowered : the flower falling away at maturity with 
the conspicuous obconical bearded stalk (callus) from the mem¬ 
branaceous equal glumes. Lower palea coriaceous, cylindrical- 
involute, closely embracing the smaller upper one and the cylin¬ 
drical grain, bearing a long and twisted simple awn jointed with 
its apex. Stamens mostly 3. Stigmas plumose. — Perennials, 
with narrow involute leaves and a loose panicle. (Name from 
erru7TT]) tow , in allusion to the flaxen appearance of the feathery 
awns of the original species.) 
1. S. avenacea, L. (Black Oat-Grass.) Culm slender, 
leafy chiefly at the base (t°-29 high); leaves almost bristle-form; 
pale® blackish, nearly as long as the pointed glumes; awn naked, 
bent above, twisted below (2' -3' long). — Dry or sandy woods, 
chiefly southward. July. 
14. ARISTID A, L. Triple-awned Grass. 
Glumes unequal, often bristle-pointed. Lower palea tipped with 
a triple awn ; the upper palea much smaller. Otherwise chiefly 
as in Stipa. — Culms branching : leaves narrow, often involute. 
Panicle racemed. (An ancient Latin name of an awned grass, 
firom arista, a beard or awn.) All grow in sterile, dry soil. 
* Jhcns separate to the base, without a joint , naked. 
1. A. dicli6toma, Michx. (Poverty-Grass.) Culms in 
tufts, much fork-branched (5* —15^ high)-, spikelets in short contract¬ 
ed racemes; flower rather shorter than the glumes; lateral awns’OH" 
nute, the middle one not longer than the palea , bent down (J 1 long)- 
<D ? — Common, especially southward. September. 
2. A. gracilis, Ell. Culms branched at the base, slender, 
naked above (6'-18' high); panicle spiked, slender (3'-6' long); 
