ORDER CXLII. — GKAMINACK.E. 595 



4. E. coxtor'tus, (Ell.) Stn7i erect, bennlcd at the joint*. /yatr« 

 long, linear-kinceolate. Panicle apprcjs.-^ed ; involucre u.-* lon^ as the 

 glumes; interior palea shortest, with a sjtirally contorted awn. — 2X. 

 ISept. — Oct, Low country. 4 — 5 foet, 



. Genus XLIIL— AXDROPO'GOX. J. {Broom-grasa.) 

 (From anei\ man, and pogon, board : from the appearance of tlio racbis ) 



Flowers polygamous, spiked. Spikelcts in pairs, 1 — 2-flow- 

 ered ; the k>\ver ones sterile ; or wjien but one, it is perfect. 

 Glumes and palere sometimes wanting; when present, the 

 glumes coriaceous. Palcce membranaceous, with the lower ono 

 generally awned. 



1. A. scopa'ru-s, (Mich.) >S/'e'//t glabrous, tinged with purple. Leavra 

 channeled, slightly hairy; sheaths hairy. Flowers in .straight panicles, 

 by pairs on the spikes; the perfect ones sessile, the neuter one stiped 

 and awned. liachis hairy. Glumes 2, the exterior 5-nerved. Palea 

 puiple, with hairy margins, the interior awned at the summit — 2^ 

 Sept. — Oct. Poor soils. Common. 2 — 3 feet. 



2. A. furca'tus, (Muhl.) Stem erect, glabrous. Leaves linear, nearly 

 glabrous; spikes generally by fours, terminal ; sterile fluret.s without 

 awns, the awn of the perfect floret contorted. — If. Augu^t — Sej>t 

 Mountains. 2 — 3 feet. 



5. A. macru'rus, (Mich.) Slem erect, slightly compressed. Lfavf* 

 linear, slightly scabrous ; sheath villous along the margin. Panicles 

 clustered; spikes conjugate, chistered, each having a sheath. J^edun- 

 c/e.s hairy. i'Vowrrs monandrou.-J, with a straight awn. — U- October 

 Damp soils. 2 — 3 feet. 



4. A. dissitiflo'rus, (Mich.) Stem erect, branching. Lravrs linear, 

 scabrous, with the throat of the sheath hairy. Pnnicle nppr< ».s4h1 ; 

 spikes conjugate. Flowcra by j>aiis, hairy, nionandruu.*, with a ^tr;li^llt 

 awn. — If. fcsept. — Oct. Connnon. 3 — i feet. li mom grant. 



.5. A. vagina'tls, (Ell.) Stnn erect, glabrous. Leaven long, linear. 

 with glabrous sheaths. Panicle slender, appressed, branches divid-'d; 

 spikes short, solitary, or conjugate, liachis hairy. O'lumrs serrulate. 

 F/oi6'r/-5 monandrous. — If. Sept.— Oct. Damp soils. 3 feet. 



6. A. terna'rius, (Mich.) Branches remote, solitary, »implo. alter- 

 nate, 3-spiked; spikes conjugate. Hairs of the bracts shorter than the 

 glume. Stamens 3. The inner palea 2-cleft, producing from the cleft 

 a long contorted awn. — Mountains. 



7 A. argen'teus, (Cass.) Stem glabrou.s branching, tit):;ed with pur- 

 ple. Leaves linear. scal)ruus. 7'an/V/c long, slender ; spike« conjng:ile, 

 covered with white silvery hairs. Glumca hairy along the nmr^iutL— 

 y. Sept.— Oct. Dry soils. 2—3 feet. 



8. A. avena'ceus, (Mich.) {A. ciliatHS,Y\\.) 5/wi erect, sometime. 

 decumbent, pubescent at the joints. Leaves scabrous, fliu'htly hniry 

 Panicle naked, expanding. Flowers perfect and sterde (jhi'»" JmTV ; 

 the exterior one m.my-nerved, the interior 5-uerved. Pnlnt cilmle. tUo 

 interior one awned.— 2^ Sept. Pine-barrens. 8 — 1 feet. 



9. A. Jtu'T.iNS, (L.) ^icm erect, glabrous, lower joints ewolhn. L<avt$ 



