584 ORDER CXLTT. GRAMINACE^!. 



tiles lacerate. Panicle long, with capillary branches ; the upper palea 

 awned, with the awn very slender. Stamens 1 — 3. Styles 2. — 2£. 

 April — May. Middle Car. 4 — 8 inches. 



5. A. compgs'ita, (Poir.) Leaves rough, long. Flowers in panicles, 

 racemose and spicate, erect. Palece acute, longer than the glumes. — 

 Carolina. 



6. A. compkes'sa, (Poir.) Flowers in elongated panicles ; peduncles 

 somewhat verticillate ; glumes compressed, exterior acute, longest.— 

 Carolina. 



V. A. clandesti'na, (Ell.) (Sporobolus asper, Kunth.) Stem erect, 

 terete, glabrous. Leaves scabrous on the upper surface, with serrulate 

 margins ; sheaths shorter than the joints, hairy at the throat. Pani- 

 cles appressed, terminal and axillary. Glumes glabrous, unequal. 

 Palece hairy, with the exterior one keeled. — 71. Sept. — Oct. Sandy 

 soils. 3 — 4 feet. 



8. A. jun'cea, (Mich.) (Sporobolus junceus, Kunth.) Stem erect, slen- 

 der, glabrous. Leaves glabrous, concave, margins scabrous. Panicle 

 with verticillate branches, about 6 in a whorl. Glumes glabrous ; the 

 exterior much smaller than the interior, both purple. Palece nearly 

 equal. — If. Dry pine-barrens. Common. 1 — 2 feet. 



9. A. Virgin'ica, (L.) (Sporobolus Virginicus, Kunth.) Stem pro- 

 cumbent, assurgent, glabrous. Leaves subulate, short, entire. Panicle 

 appressed. Glumes, the exterior shorter than the palese, keeled, the 

 interior larger. Palece nearly equal ; the exterior acute, the interior 

 obtuse. — If. Aug. — Sept. On the sea-coast. 6 — 8 inches. 



10. A. pauciflo'ra, (Pursh.) Stem erect, glabrous. Leaves linear, 

 villous ; sheaths striate, with short stipules. Panicle with filiform 

 branches. Glume unequal, with short awns. Palece villous, with short 

 awns. — If. July. Mountains. 12 — 18 inches. 



11. A. cin'na, (Lam.) (Cinna arundinacea,~L.) Stem erect, glabrous. 

 Panicle large, weak. Leaves broad, linear, 1-valved, slightly awned be- 

 neath the summit. — 2£. Aug. Middle Georgia. 



12. A. lateriflora, (Mich.) (Cinna lateriflora.) Stem erect, branch- 

 ing above. Leaves broad, linear, flat. Panicles lateral and terminal, 

 dense, somewhat secund. Glumes acuminate. Palea longer than the 

 glumes, equal, pubescent at the base, without awns. — It. Aug. — Sept. 

 Swamps. 1 — 2 feet. 



Tribe VI.— CHLORID'EJS. 



Spikelets in unilateral spikes, 1 — many-flowered, digitate or 

 paniculate ; rachis not articulated. 



Genus XIX.— CYN'ODON. Rich. 

 (From kuon, a dog, and odous, a tooth.) 



Spikelets 1 -flowered, with the rudiment of a flower on a ped- 

 icel. Spikes digitate at the summit of the stem. Glumes un- 

 equal, keeled. Palece unequal, the lower larger. 



1. C. pac'tylon. Low creeping plant, with short flat leaves. Spikes 



