TRIANDRIA.— DIGYNIA. 47 



rigid, pungent at the point ; flowers in a racemose 

 panicle. 

 IIAB. Mountain meadows. Apr. — May. U . Culm 

 18 in. high; rad. leaves long ; culm leaves few, very 

 short; pan. very simple; cor. white, hairy ; seed 

 large, white. 



DIGYNIA. 



45. LEERSIA. Rice-grass. 



L. virginica : panicle simple ; the lower branches 



diffuse ; flowers appressed, monandrous, sparingly 



ciliate on the keel. 

 HAB. Wet woods and swamps. Aug. lj. . Culm 2 — 4 



ft.high,genicul.; sheaths scabr. ; flowers clasping 



the pedicels, punctate. 

 L. oryzoides : panicle diffuse, sheathed at the base ; 



flowers triandrous, spreading ; keel of the glumes 



conspicuously ciliate. 

 HAB. Ditches and swamps. Aug. — Sept. U . Culm 



3 — 5 ft. high ; leav. and sheaths very scabr. ; fl. 



whitish, 



46. PASPALUM. 



P. cilidtifolium : culm decumbent ; leaves hairy anol 

 ciliate; sheath hairy; spikes 1 — 2, rather loose, 

 indistinctly 3- rowed. 

 IIAB. Sandy fields. Sept. 4. Afoot and a half 

 long, simple; term. spik. on a long pedunc. ; jl. 

 plano-convex , on bifid pedicels ; rack. flex. 

 P. setacevm : culm erect ; leaves and sheaths villose . 



spike generally solitary ; flowers in 2 rows. 

 HAB. Sandy fields. Sept. U. Culm \— '2 ft. high 

 simple ; rachis convex on the back. 

 . P. lave: erect, very smooth ; leaves short; spike*- 

 numerous, (3—6,) alternate ; flowers 2-rowed, 

 -inuoth. 

 HAB. Banks of rivers. Sept.— Oct. u. • 2 ft. high , 

 lea*t$ broad-linear ; spik. a Utile spreading; pedi- 

 fj \-jl. subovate, large. 

 . r itoloniferum : Bpikes in elongated racemes, -onv 



