GRAMIXK.E. 265 



wiih th^ branches nearly verticillate, expanding. Glumes acute, the exterior 

 largest. Palea much shorter ii.an the glumes, unawned- 

 4 May — June. In the low country. 1-2 ft. 



6 A Alba. Sttrm geniculate, assurgenf, terete, glabrous. Ijearrs ner>ed, 

 scabrous. S/i/>m/«*' ovate, membranaceous. f<init/f la.x, the branches usu- 

 ally by pairs, and verticillate. Glumes nearly equal, the exterior somewhat 

 shortest. PaU« with the exterior valve lanceolate, shorter than the calyx. 



This plant is considered by some, the same as the preceding, but we be- 

 live that they are distinct species. 



7 A Ju.NCEA. Stem erect, slender, glabrous. Leaves glabrous, concave, 

 margins scabrous. Panicle with verticillate branches, about 6 in a whorl. 

 Glumes gIa!)roijs, the exterior much smaller than the interior, bothj purple. — 

 Paleet nearly equal. 



% Dry pine barrens, common. 1-2 ft. 



8 A Cla.ndesti-xa. Stem erect, terete, glabrous. Leaves scabrous on the 

 upper snrlacc. wi(h serulaie margins. Sheaths shorter than the joints, hair}' 

 at the throat. i^umV/fs appre-sed, terminal and a.xil!ary. Glumes glabrous, 

 unequal. Puh<r hairy, with the exterior one keeled. 



% Sept.— Oct. Sandy soils. 3-4 ft. 



9 A Indica. Stem erect, terete, glabrous. Leaves long, attenuate, erect. 

 Sheaths glabrous, shorter than the joints. Panicle consisting of erect, late- 

 ral racemes. Glumes lanceolate, the exterior largesL Palece twice as long 

 as the glumes. 



% July— Oct. Common. 2-3 ft. 



10 A ViRGiNiCA. Stem procumbent, assurgent, glabrous. Leaves subu- 

 late, short, entire. Panicle appressed. Glumes the exterior shorter thaa the 

 palese, keeled, the interior larger. PalecE nearly equal, the exterior acute, the 

 interior obtuse. 



% Aug. — Sept. On the sea coast. &-8 in. 



11 A Pacciflora. Sfem erect, glabrous. i>«re« linear, villous. Sheaths 

 striate, witii short stipules. Panicle with filiform branches. Glume unequal, 

 with short awns. Paleee villous, with short awns. 



1^ July. Mountains. 12-18 in. 



12 A Ci.NNA. Cinna Arundinacea. Stem erect, glabrous. Panicfe large, 

 weak. Leavt-s broad, linear, 1-valved, slightly awned beneath the summit. 



% Aug. -Middle Georgia. 



13 A Lateriflora. Stem erecr^ branching above. Leaves broad, linear, 

 flat. Panicles latera' and terminal, dense, somewhat second. Glumes acu- 

 minate. Pale<B longer than the glumes, equal, pubescent at the base, with- 

 out awns. 



% Aug.— Sept. Swamps. 2-2 feet. 



Gems II TRICHODIUM. 



Glumes 2, l-flowerod. Palea 1, shorter than tlie glumes, 

 bearded, and suj)|)oricd at t!»e basa by fasiclesof liairs. Flow- 

 ers in capillary panicle:*. 



1 T Laxiflorux. Sfem erect, glabrous. Leaves setaceous, scabrous. — 

 PanicUf ditfuse, capillary, with trichotomous branches. Glume? un<'qual, 

 lanceolate, acute. Pa/tee shorter than the glumes, with tlie margins pubes- 

 cent. 



% March — .May. Dry fields, or swamps. 18 in. — 3 ft. 



2 T Pei -' "> ''ecumbenf, slender, clabrous. Leaves slightly 

 scabrous- than the joints. Panicle dilTuse. Glumes nearly 

 equal, acute. /'«^ • tr than the glumes, acate. 



"4 Sept- — Dt ~ady places. 12-18 in. 

 PAKT II. 21 



