96 



CLASS XIX. MONOECIA, 



ORDER, BZANDRZA. 



S14. LEMNA. Nuit. Gen. 2S. 

 [Supposed from the Gr. ichina, or Lemma, a husk, shell, or skin; from the form of its leaves 1 



Male, Cal. 1 leavedi roundish, entire, openmg on one side- Cor. 0. 

 Female, Cal. as in the male. Cor. 0. Style 1. Utriculus 1 or 2 seeded. 



L. MINOR. Ell. Fronds elliptic, or subovate, flat, cohering at base; roots solitary. 



Fn/g:o— Duck-meat. 



Fl. Beginning of June? J^r- mat. 



Hob- Stagnant waters: along Brandywine: frequent. Very minute; floating on the surface. 



Ohs. I have but rarely detected th" flov^ers on this diminutive plant; and am unable to determine, to my 

 own satisfaction, whether it properly belongs to this class, ornot: though I observe Mr. Elliott retains it 

 here. 



ORBER, TRSAlfBRSA. 



315. CAREX. Nutt. Gen. 733. 

 [Supposed from the Lat. carere, to lack, or want; because the male spikes are destitute of fruit.] 



Flowers glumaceous, imbricated in an Ament: Male, Cal. a single scale. Cor. 0. 



Fem. Cu/. a scale. Cor. 1 glumed, ventricose, inclosing the triquetrous Secrf Stigmas 2 ox ^ 



§ 1. Spikes all androgynous. 



a. Spike inostly solitary. Male flowers at base. Stigmas 3. 



C. s«iTTARROsA. Schw. Spike Simple, oblong-oval; fruit imbricate, horizontal, beaked. 

 Synon. C. typhina. Mx. C. cephalophora .' Eatmi. Fu/go— Sedge. Sedge-grass. 



JFl. Latter end of May. Fr. mat. Latter end of August. 



Hab. Low, wet woodlands: frequent. 1 to2 feet high: spikes rarely 2, or 3. 



Obs For an excellent account of the North American Carices, see the Monograph of Mr. Schweiriitzi, 

 edited by Dr. Torrey, in the 1st Volitme of the Annals of the Lyceum of Natural History, of New York. 



b. Spikelets several, aggregated into a head- Male flowers at summit. 



C- CEPHALOPHORA. Schw. Splkelcts crowded 111 an elliptic head; fruit ovate, compressed, marginate. 



Fl. Middle of May. Fr. mat. Latter end of July. 



Hab. Hilly woodlands: Jos. Osborne's, &c. frequent. About 2 feet high: spikelets 3 to 6, clustered, 



c. Spikelets distinct. Stigmas 2. t Male flowers at summit. 

 C BROMOiDES. Schw. Spikelets linear- oblong, alternate, remote, erect; fruit oblong, beaked. 

 Fl. Latter end of April. Fr mat. Middle of July. 



Hab. Swamp*., forming tuisocJts: frequent. 12 to 18 inches high: spikelets about 4. 

 r ROSEA Schw Spikelets remote, few flowered, a long bracteatthe base of the lower one; fruit ovate 

 CT "R "" ■ of Mav ^'"' ■"*"*■ ^'^'^'*' ^^ '^"'y- 



Hab. Moist woodlands: Bath,&c. frequent. 9 to IS inches high: spikelets 3 to 6, small. ' 



C. MuHLENBERGii. Schw. Spikelets ovate, alternate, approximate, bracteate at base; fruit ovate, marginate 



Fl. Middle of May. 



Fr. mat. Latter end of July. 



Hab. Dry, stony hills: Barrens, &c. frequent. 1 to 2 feet high: spik.-leU about 5. 



05... In genera) appearance this resembles C cephalophora; and might be readily confounded with it. by 

 a careless observer. 



