440 GRAMINACE^E. 



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. 1st 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 23 inches 

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

 identical with it. Soft Trisetum. 



37. DANTHONIA. D. C. Danthonia. 

 (In 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 spicata' Linn. 



Woods and fields. Can. to Car. W. to Mich. June Aug. 1|-. Culms 

 1 2 feetliigh, erect, cespitose at base. Leaves very narrow, numerous below. 

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



38. URALEPIS. Nutt. Uralepis. 



(From the Greek ovpa, a tail, and ACTTI?, a scale ; 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 simple, racemose. 



U. aristutata 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. (I), 

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

 minal panicle, when exserted, spreading. Flowers purplish. 



Short-awned Uralepis. 



IX. FESTUCE.E. 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. 



