TRI\NDRTA BIGYNIA. 14 | 



1. Spictformis. E, 



A. floribus confprtis, j Flowers crowded, some- 

 siihspicatis ; arista inter- wliat spiked ; tlie middle 

 media basi villosa. j awn villous at base. 



Boof perennial- Stem 1 — 3 feet higli, simple, slightly compressed. 

 leaves linear, glabrous, the upper surface and niar<rins scabrous ; 

 sheaths shorter than the joints, uith the tliroat glabrous. Flowera m 

 compound racemes, so much appressed as to resemble a cylindrical 

 spike, (alyx much shorter than the corolla, slightly compressed, 

 both valves terminating in awns. Corolla^ exterior valve involutp, 

 terminating in 3 awns, about as long as the valve; the intermediate 

 awn longest, and slightly villous at base; inner valve .^ very short, 

 membranous. Filaments short. Anthers purple. Styles short. i>ti^* 

 "^'Ms plumose, purple. 



GroMS in wet pine barrens. 



Flowers September — October* Spike -flowered Jlristida, 



All the species of this genus grow in poor, sandy soils, and forra 

 tufts of dry, coarse grass. 



2. DicHOTOMA. Mich 



A. CulmiftftPtarpic 0vf^r^ 



m 



Stem setaceous, ererf 



tis,subdichototnis; calycis somewbat dichotomous; 

 valvis corolla longiori- cal\ 



bus 



istis lateralibus, I rolla; tbe lateral 



aw 



brevissimis, intermedia | very sbort, the intenne- 

 longiore, contorta. E. j diate longer, contorted. 



AHch. 1. p. 



Soot perennial, cespitose. Stem 8—12 inches liii:;h, very slender, 

 "?ia, columnar, glabrous, branching. Leaves 2—4 inches Ion"-, 

 scarcely exceeding 1 line in breadth, flat, finely serrulate; sheath* 

 ^ucd shorter than the joints : stipules short, membranous. Fhncers 



racemes, generally simple ; a raceme is frequently produced at every 



atp f -^ ^^ *^^ '^^^y^ longer than the corotla, narrow, lanceo- 

 le, termitiafmg in short awns, particularly the inner valve; keel 



'ihorT f • f*"'"^^" involute, terminating in 3 awns ; the 2 lateral ones 

 rn^«n ^^^^^' ^^^^ intermediate larger, longer, but not as long as the 

 "^or^lla, contorted and bent horizontally. 



brat, u ^]^"*' '^ ^^^ properly dichotomous; it merely produces a short 

 Branch at every joint. ^ J v 



^f^ws in the upper districts of South-Carolina. 



^^''^''^ . Branching ^rUtida. 



*' 



