88 TUIANDRIA DIGYNIA 



* Inflorescence Panicle d. 



1. A. xutaxs, /,. Panicle terminal, oblong, or loose and spreading, 

 at length nodding; abortive spikelet incomplete ; glumes of the perfect 

 spikelet rufesccnt, shining, the lower one hairy ; awn contorted. Beck, 

 Bott p. 418. Sp£cim. Gray, Cram. 1. /it. 67. 

 A. avenaceura. Mx.Am. \. p. 58. Pers. Syn. !./>. 104. Bart. Phih 



1. /;. 54. Floruh Ceatr. p. 15. Also, mild. A7;. 4. p . 907. PursA, 

 <£m. 1. p. 74. JVttf*« Gen, I. p. 6!. 



.'7/6-0, A. eiliatus. A7/. Sk. 1. />. 144. Eflf. Man. p. 18. 



Nodding Androfogox. Vulgo — Wood grass, Indian grass. 



Root perennial. Culm 3 to 5 feet high, simple, icrote, glabrous: tiodes bearded 

 with white appresscd hairs (glabrous, Muhl). Leaves glaucous, lanceolate, con. 

 traded at base, attenuated a! apex, scabrous, margins serrulate: sheaths nerved, 

 smooth; ligule elongated, truncate, bordered by a lanceolate extension el' the mar- 

 gins of the sheath. Pattii It 1 1 long, 6 to 10 inches in l- ngth, often loose and spread- 

 ing, finally nodding: the ultimate branches, or pedicels of the upper spike lets, pi u- 

 mosely hairy. Abortitc spikelet pedicellate, often a mere awn-like plumose rudim- 

 ent, shorter than the perfect one. Glumes of 'the perfi ct spikelet lanceolate* Indura- 

 ted, of a light russet browns lor ; the lower or outer one hairy, embracing the upper 

 one, which is smooth and rather longer* Palea thin, m< mbranaceuus;,lower one 

 lancc-li near, oil iate at apex ami on the indexed margins; upper? one (lower om , 

 Torr.) shorter,! ifid, awned below liio division, contraciod al the base so as to ap- 

 pear pedicellate; uin: contorted, bent obliquely. 



Hub. Stirile soils : neglected old fields : common. /V.Aug. Fr. Scj l. 



Obs. I do not find it easy to determine, satisfactorily, whether it l e the upper, 

 or lower palea, that is awned, in this genus j but, to my \ i«-v, , it appears to be the 

 ujrper one. Certainly, I think, it is the one next to the uj j t r. inner, or em I rac( 1 

 glume. Sometimes both paleoe are awned, in the terminal spikelets; — or perhaj s, 



in these cases, there may be an t V rl al a sc ond floret* 



* * Inflorescence Spiked: Spikes simple, conjugate, or fasciculate. 



2. A. mac no ruts, Mjc* Sheaths somewhat scabrous and pilose; 

 spikes conjugate ; peduncles sheathed, fasciculate, in dense fastigiate 

 panicles, terminal and Literal ; abortive spikelct incomplete ; perfect flo- 

 ret monondrous ; awn straight. Beck, Bot. p. 418. SpEcrwr. Gray, 



Gram. 1. no. 66. 



Largk-tailkd Axnnorooox. Vulgd — Cluster-flowered Indian grass. 

 Root perennial. Culm 2 to o feet high, smooth, sulcata on one side, much 

 branched towards the top: nodes smooth. Leaves nerved, scabrous; lower ones 

 linear, long ; upper ones short, erect, linear-lanceolate, or somewhat subulate: 

 skeaths rather open, roughish, upper ones often hairy : ligule short, truncate, mi- 

 nutely fringed. Spikes mostly in pairs, scarcely an inch longs partly conceaUd 

 in the compressed, boat-shaped sheaths, aggregated in dense, fastigiate, terminal 

 and lateral clusters; the common peduncles pilose at the La.se of the sheaths : ra» 

 this filiform, clothed with long while silky hairs. Abortive spikelet an awn-likc 

 plumose pedicel, longer than thecperfect one. Psrfm t spikelet small, lance-linear, 

 triquetrous, acuminate, angles serrulate : glumes equal ] the lower or outer one 

 with two green keels, the upper with one. Palcce very thin and delicate, linear | 

 the upper ? one with a slender straight awn. Stamen 1. 



Hab. Low, swampy grounds, in the Mica-slate; frequent. FU Sept, Fr. Octo. 



