\ TRIANDRIA. MONOGYNIA. 



upon setaceous spikes disposed in a panicle. — 

 Calix 2-valved, 2-flowered, (nie of iho flowers 

 in the form of an abortive pedicellate seta, 

 valves li.^id, subulate, and umMjssal. 8:«'o\vin.i^ to 

 the impressed angular rachis. Corolla, hcrnia- 

 phr-odite, 2-valved, outer valve teiminatcd by 

 a long and straight awn. J\^eutral rudiment 

 pedicellate, of one minute valve going out into 

 an awn. Seed line ar-oblong, internally marked 

 with a longitudinal fui-row^ 



Allif^d to the .s^emis Leptr/nis, of Mr. R. Brown; differ- 

 ing-, however, much in hab i, and considerably in charac- 

 ter, b'it destitute of all atfiniiy with Andro])oo;on. 



Species. 1. ^i. Leptmoides. Rcjot perennial. Culm 18 

 inciies to 2 ff et, decumbent at the bas , upwards assur- 

 genl and erect, leaty, with short atul numt-rous aiticula- 

 tions. Leaves short, (I ai'd a lialf to 2 inch' s long-) ovate- 

 lanceolate, very acutf, smooth, flat, rit^idly spieadmg, 

 and distichally approximate, pt-rceptibly nerved on the 

 under side, and exquisitely striate, near half an inch 

 broad; sheaths bearded exitinally at the summit, stipula 

 obliteiaied. Panicle subverticillate; spikes or racemes 

 nunierous (20 to 30) simple, setaceous, and very long-, (4 

 to 6 incises;) rachis ang-idar, scabrous. Flowers inter- 

 rupted, ipproximating tou aids the extremities, appressed 

 to the raci)!S. Clalix 2-valved, 2-flowered, (one of the flow- 

 ers always iniperfect and neutral,) g-iowing- to the rachis, 

 persistent, valves unequal in length, very narrow, cari- 

 nate, ri^id and puni^enti\ subulate, each with a sing-le 

 nerve; the inner valve shorter, appressed to superficial 

 depressions in the rachis; rachis and calix purplish. Co- 

 rolla liermaphrodite, 2-valved, dorsal valve linear lanceo- 

 late, obiuseiy carinate, o-nerved, terminated by a slender, 

 straii,ht. scabi'ous awn, nearly 3 times its own length, a 

 little villous on the margin, and at the base; inner valve 

 flat, membranaceous, 2-nerved, acute Neutral rudiment 

 pedicellate, very minute, 1-valved, with an awn somewhat 

 longer than the pedicell. Stamens 3^ exserted. Styles 2; 

 siigma plumose. Seed naked, linear-oblong, with a de- 

 pi e^sed furrow on the umcr bide, and an obtusely angular 

 ridge on the other. 



On the banks of the Potomac, near Harper's FeiT}-, 



Virguua, and iiithe pine barrens of Carolina and Georgia. 



This plant is in many respects very closely allied lc>» 



