GRAMINE^. (grass FAMILY.) 569 



1. D. spicata, Bcauv. Spikclcts 4 - 8, racemose, "-flowered; lower palca 

 rough with short rigid hairs, much longer than tlio lanceolatc-suhulato 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. Spikclcts numerous, paniclcd, 7-flowercd ; lower 

 palca 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. ARRHENATHERUM, Bcauv. 



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

 branches. Spikclcts 2-flowered, with the awn-likc rudiment of a third flower; 

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

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

 perfect flowers slightly awnod near the apex, that of the staminatc 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. Ij.. 



45. ANTHOXANTHUM, L. Sweet-scented Grass. 



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

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

 on the back ; the upper flower perfect, of two smooth awnless palcse, 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 palcse. 



1. A. odoratum, L. Culms 1° high; 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 paleaj, 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 palca;. 



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

 short, with the upj)crmost sheath inflated; spike (|'-1' 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. (T) — Leaves 

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



Var. angUSta. (P. angusta, A^cs.) Culm stout (2° -3° high); spike cy- 

 48* 



