graminkje: 267 



Genus VII PANICUM. 



{The fir^t eleven species of thisjjeJiMs would constitute the genus SetariA, 

 but as that ifenus difrei^ from tlit- i*unicHm only by haviiii,' 'he flowers in 

 spikes, we do not deem ii of surticieiit importance to aherihe arrangement 

 from that to which w« have been accustomed ] 



Glumes 2, unequal, llie lower one very small ; the lower flo- 

 rets usually abortive, or l)earin«T stamens only. PalecB con- 

 cave, (M|iial, l)oarclk'SS. jSeev/ coated with the paleae. Flow- 

 ers in loose, scattered panicles or sj)ikes. 



1 P CtiNcnRoiDEs. Stem erect, scabrous near the summit, leaves sca- 

 brous, ciiniracted at the throat. Flow^rs in a compact, riuid spike. Involu- 

 cre many cleft, with the exterior seamenis short. Glume* nearly equal nerv- 

 ed, with an accessory glume of half tlieir length. Palcte loriger than the 

 glumes- 



%• 



2 P L.F.viG.'ivuM. Sfem procumbent, cotn pressed, tlie upper joints longest. 

 /^atv« nariow, ylabrous. S heal hs coniyressGd. it^ynA-ecoJuinnar j spikelela 

 l-flowered. Inrohicels 10-awncd, 



% Throuiih tlie summer. Sea islands 1-2 ft. 



3 P CoRRUGATUM. Stem ,.rect, terete, sliirhily scabrous. Leaves acute* 

 scabrous. Stiealhs long^or ilian the joints. Flowers in compound, compact 

 spikes ; spikelets wi'h about half the floA'ers fertile, the otiiers sterile. Glumes 

 with an accessory valve, 5-nerved. Pateee as long as the glumes, the exterior 

 one wrinkled. 



1^ Through the summer- Low country. 2-3 ft. 



4 P Crus Gali.i. Stem erect, terete, glabrous. Leaves \ons, scabrous. 

 Flowers on spikes forminir a terminal panicle. Ruthis angled, hairv. — 

 G/uwjM2-flowered, one perfect, the other sterile; exterior slume with a long 

 awn, the interior one flat, awned, the accessory glume very small. 'Palece 

 pubescent. 



O Aug. — Sept. Cultivated grounds. 2-4 k. 



The glumes of this species are not always awned, and the awns vary yery 

 much ill length. 



5f Waltem. 5r«» erect, slender, glabrous. Z^avc* horizon ttil, glabrous, 

 throat of the sheath ciliate. Flowers in alternate spikes, in 3 rows. Rachis 

 scabrous. Glumes 2-iAo\vered, perfect and sterile. 



O Through the summer. In damp soils. Low country. 2-3 ft. 



6 P HtRTELLUM. Stem procumbent, creeping, sometimes assurgent, hairy 

 at the joints. Ijeares undulate, scabrous, sliirhtly hairy, contracted at the 

 base, throat and margin of the sheath hairy, spikes compound ; spikelets 5-8- 

 flowered. Rachis angled, villous Glumes l-flowered, with pur{)le awns- 



% Augus' — Oct. Rich dry soils. 



7 P. GtBBiTM. »S^rm erect, glabrous. Z>rire« linear-lanceolate, pubescent. 

 Flou-rrs in appressed racemes. Glumes 2-flowere(l, perfect, and sterile. Fa- 

 lea of the perfect flower about half the Iciiiith of the glumes. 



Througii the Summer. Damp soils, common. 1-2 ft. 



8 1* MoLi.E Stem erect, pubescent towards the summit, and all the joints- 

 Leore.? glabnnis with the throat of the sheath ciiiate. Flowers in spikes or 

 racemes. Glumes 2-flowered perfect, and sterile ; valves acute, hairy. Pa- 

 iea of the sterile floret 1. 



% AuBust — Sept- On the sea islands. 4-6 ft. 



9 P Gt.mnocarpon v^cm erect, glabrous. 2>awA cordate, long. Sheaths 

 about the leiiirtli of the joints, striate. Flowers in simple panicles m two rows 

 on one si'lc of the ijrancnes ; spikelets 3-5 flowered. Glumes 3. jPahce about 

 half tlie length of the glumes 



% August— Sept. Low country. 2-4 ft. 



(6) Flowers in panicles, either solitary or in racemes. 



