440 GRAMINACEiE. 



contracted and somewhat spiked; glumes 2-flowered, the flowers not 

 bearded ; awn about the length of the palea, not twisted, diverging or re- 

 curved. ( Torr. N. Y. Fl.) T. subspicatum Beck Bot. \s,t Ed. Avena 

 mollis Mich. 



Banks of streams and on mountains. Arct. Amer. Western N. Y. White 

 Mountains, N. H. Rocky Mountains. June. %■. — Culm about a foot high, 

 erect, slender. Leaves 2—3 inches long, narrow-linear. Panicle 2 — 3 inches 

 lon^, with appressed branches. Closely allied to T. subspicatum and perhaps 

 identical with it. Soft Trisetum. 



37.. DANTHONIA. D. C— Danthonia. 

 (hi honor of M. Danthoine, a French botanist.) ^ 



Spikelets 2 — 10-flowered ; the upper flowers often imperfect. 

 Glumes nearly equal, mostly longer than the flower. Palese 

 hairy at the base ; lower one 2 -toothed at the summit, with a 

 twisted awn between the teeth ; upper one obtuse, entire. — 

 Flowers in a spiked panicle. 



D..spicata Beauv. : leaves subulate ; lower sheaths hairy at the throat; 

 panicle spike-form, simple ; spikelets 7 — 9, about 7-flowered ; lower palea 

 hairy. Avena spiccda Linn. 



Woods and fields. Can. to Car. W. to Mich. June — Aug. 11-. — CulTiti 

 1 — ^2 feet high, erect, cespitose at base. Leaves very narrow, numerous below. 

 Panicle 1-sided, short, the lower branches sometimes divided. Wild Oats. 



38. URALEPIS. A'///.— Uralepis. 



(From the Greek o-j^a, a taU, and AsTrtf, a acdo ; in allusion to the appearance 

 of the lower palea.) 



Spikelets 2 — 3-flowered, somewhat terete ; flowers alternate, 

 distinct, longer than the glumes. Paleae very unequal, dis- 

 tinctly villous on the margin ; lower palea tricuspidate, the cen- 

 tral cusp produced into a short bristle ; upper entire, concave, 

 incurved. Caryopsis gibbous. — Panicle shnple, racemose. 



U. aristuLata Nutt. : lateral panicles concealed in the sheaths of the 

 leaves, terminal one more or less exserted ; spikelets 3-flowered ; awn as 

 long as the lateral cusps. 



Sea coast and sandy fields. N. Y. and Penn. W. to Ark. Aug., Sept. 0. 

 — Calms about a foot high, cespitose, jointed. Leaves short, subulate. Ter- 

 minal j)anicle, when exserted, spreading. Flowers purplish. 



Short-atoned Uralepis. 



IX. Festuce^. Spikelets usually many-flowered. Glumes and 

 palecc 2, of nearly similar texture, usually keeled. Lower palea often 

 awned; the awn not twisted. 



39. POA. Linn. — Meadow Grass. 



(Greek noa, grass, or pasturage ; applied by way of distinction to this genus.) 

 Spikelets 2- many-flowered ; the flowers distichous, perfect. 



