GRAMINEJE. 281 



(rlumcs and pahup sometimes wanting, wlien present, the 

 glumes coriaceous. Palciv membranaceous, willi tlie lower 

 one fjenerallv awned. 



1 A CiLiATDS. Stem erect, sometimes decumbent, pubescent at the joints. 

 Leaves scabrous, slii,'hily hairy. Fanirle naked, expanding. Fluu-ers perfect 

 and sterile (iluims liairy, the e.xicrior one many nerved, the interior 5-ncr- 

 ved. Puhue ciliate, the interior one awned. 



% Scpiember. Fme barrens. 3-4 ft. 



2 A Nutans. 5^<'wj erect, glabrous, lower joints swollen. Aeauci scabrous. 

 Panicle branching nodding. Flowers by pairs. (Humes liairy, colored, fring- 

 ed at the smnmit. Fale<E hairy, the inner one with a contorted awn. 



% Sept. — Oct. Dry soils. Very common- 3-6 ft. 



3 A .Melanocarfl's. Stem ereci, branchinL', glabrous. Leaves scabrousi 

 with the slieaih hairy at the throat. Sjiikrs clustered, many llowcrcd, with 

 the involucre bearing a long awn. Glumes 2, lanceolate, pubescent, colored. 

 PaletF small, membranous, with a loni: contorted awn arising from the base- 



% Sept.- Oct. Pine barrens. 2-3 ft. 



4 A ScopARics. Stem glabrous, tinged with purple. Leaves channeled, 

 slightly hairy. Sheaths hairy. Flourrs in straight panicles, by pairs on ihc 

 spikes, the ])crfect o:ics sessile, the neuter one stiped and awned. liachis 

 hairy. (Humes 2, tl;c exterior 5-nervcd. Puha- purjije, with hairy margins, 

 the interior awned at the summit. 



% Sept. — Oct. Poor soils, common. 2-3 ft. 



5 A Argentel's. Sltm glabrous, branching, tinged with purple. Leaves 

 linear, scabrous. Taniele long, slender. i>j>ikes conjugate, covered with 

 white silvery hairs. Glumes hairy along the margins. 



1\. Sept.— Oct. Dry soils. 2-3 ft. 



6 A Vaui.vatus. Sfrm erect, glabrous. Leaves long, linear, with glab- 

 rous shraths. Panicle slender, appresced, branches divided. Spikes sliorf, 

 solitary, or eonjuirafe. Rurhis hairy. Glumes 'jcTnilate. i^/o«-ers iiionandrous. 



% Sept— Oct. Damp soils. 3 ft. 



7 A DiSiiTiFrx)RLM. Sinn ere*t, Irancliing. Leaves linear, scabrous, 

 with the throat of the sheath hairy. Vamclc appressed. Spikes conjugate. 

 Flowers by pairs, hairv, monandrous, with a straight awn. Broom grass. 



% Sept.— Oct. Common. 3-1 ft. 



8 A Macrourcs. ^^effi erect, slightly compressed. /.carM linear, slightly 

 scabrous. SAff-z/A vi Ions along the margin PnwiV7c5 chi.'^tcred. S/;jAe.>{ con- 

 jugate, clustered, each having'a sheathr redundcs iiairv. Flowers inonan 

 dro'JS \\;ih a straight awn. 



% October. Damp soils, 2-3 ft. 



9 A Tetrastachvus. Stem erect, glabrous. Leaves long, hairv on the 

 upper surface. Sheaths hairy. Panicle slender, erect, npprcs.sed ; .sheaths of 

 the spikes long. Spikes usually 4, G/m//ic.* serrulate, with a hairy involucre 

 at the ba.«!c. Ftoicera monandrous. 



% October. Pine barren". 2-3 ft. 



-, ^9 '"^ Flrcatus. Sfetn erect, glabrous. Uaves linear, nearly glabrous. 

 Spike; generally by four.s terminal ; sterile flurcti without awns, the awn of 

 the perleci floret conti;rted. 



% August— Sept. Mountains. 2-3 ft. 



Genus XXXVI. GVMNOPOGOX. 



Glumes 2, carinafc, nearly tqual, longer tiian ti;c .^urct. 

 PahcR shorter than th-^ glmnes, equal ; l!io exterior one 3- 

 nerved, terminated hy a straight awn. Spike panicled, 



22* 



