GRAMINE^E. (GRASS FAMILY.) 569 



1. D. spicata, Beauv. Spikelets 4 - 8, racemose, 7 -flowered ; lower palea 

 rough with short rigid hairs, much longer than the lanceolate-subulate teeth ; 

 culms (10' - 18' high) slender ; leaves short and narrow, soon involute. (Avena 

 spicata, L.) Dry barren soil, Florida, and northward. June and July. Ra- 

 ceme l'-2' long. 



2. D. sericea, Nutt. Spikelets numerous, panicled, 7-flowered ; lower 

 palea white with long silky hairs, as long as the slender, awn-pointed teeth ; 

 culms 2 high ; sheaths of the linear leaves woolly above. (Avena spicata, Ell.) 

 Upper districts of Georgia, and northward. April. 



44. ARRHENATHERTTM, Beauv. 



Tall grasses, with flat leaves, and spreading panicles with clustered or whorled 

 branches. Spikelets 2-flowered, with the awn-like rudiment of a third flower ; 

 the lower one staminate, the upper perfect. Glumes membranaceous, concave, 

 the upper one as long as the flowers. Palese herbaceous ; the lower one of the 

 perfect flowers slightly awned near the apex, that of the staminate flower bearing 

 a long bent awn below the middle. Stamens 3. 



1. A. avenaceum, Beauv. Culms smooth, 2 - 3 high ; leaves broadly 

 linear; panicle narrow, whitish, 8' -10' long; glumes scarious. North Caro- 

 lina, Curtis. Introduced. May. !(.. 



45. ANTHOXANTHTJM, L. SWEET-SCEXTED GRASS. 



Grasses with flat leaves and 3-flowered spikelets, crowded in a spiked panicle ; 

 the two lower flowers neutral, and consisting of a single hairy palea awned 

 on the back ; the upper flower perfect, of two smooth awnless palese, and two 

 very thin glumes, the upper one 3-nerved, longer than the flower, and twice as 

 long as the 1-nerved lower one. Stamens 2. Grain enclosed in the paleae. 



1. A. odoratum, L. Culms lhigh; leaves linear, hairy ; panicle l'-3' 

 long. Low grounds around the larger cities, Savannah, Charleston, &c. In- 

 troduced. April and May. 



46. PHALARIS, L. 



Spikelets crowded in a densely spiked panicle, 3-flowered ; the two lower flow- 

 ers reduced to hairy scales ; the upper perfect, consisting of 2 boat-shaped awn- 

 less, at length coriaceous palea;, the lower one longer and enclosing the upper, 

 and two nearly equal broadly keeled glumes which are longer than the flower. 

 Stamens 3. Styles elongated. Grain enclosed in the palea;. 



1. P. intermedia, Bosc. Culms ascending, slender, 6'- 12' high; leaves 

 short, with the uppermost sheath inflated; spike ('-!' long) oval, compact; 

 glumes lanceolate, slender-pointed, broadly keeled, twice as long as the hairy 

 ovate flower. (P. Americana, Ell. P. microstachya, DC.) Sandy places 

 along the coast, Florida to North Carolina. April and May. (J) Leaves 

 .broadly linear, 1 ' - 2' long, somewhat glaucous. Spike white or purplish. 



Var. angUSta. (P. angusta, Nees.) Culm stout (2 -3 high); spike cy- 

 48* 



