r.RAMI>E^. 271 



3 P Pr.kcox. Stem erect, plubrous. leaves linear- lanceolate, glabrous. 

 Spikts muncruus, wiiii the tK)v\ers crowded, 2 from mcji hinl, jind one of 

 llieni sessile. Juufus hairy at the bnse. Glumes orbicular, glal)roi:s. 



'4 May— Auij. Damp soils. 1-2 ft. 



4 P Ljkve. Stem erect, glabrous. Leaves short, lanceolate, glabrous, 

 hairy at ilie throat. Spikes 'S-6. Flouers 1 from each head. Jiuchis little 

 hairy at the base. 



% June— Sept. Damp pastures. 1-2 fu 



5 P FixmiDANUM. Stem erect, "labrous. Leaves long, the lower ones 

 hairy and jicabrous, the upper ones beconnng nearly glabrous. Throat of the 

 sheath villous. S/>^A^;s generally 3. A'mcAis hairy at the base. Floivcrs 1-2 

 from each bud. 



% June — Sept. Common. 3-4 ft. 



6 P PvRPiRAscENS. ?/<MJ decumbeut, and erecf, branching, glabrous. — 

 Leaves lunir, hairy at the base, daik purple. Spikes nunjerous. Flovoe's 

 crowded, 2 from each bud. R-ichis hairy at the base. 



% July — Oct. Common. 12-18 in. 



7 P DisTiCHUM. Stem prostrate, creeping, geniculate. Leaves short, shin- 

 ing. Sheath with the throat hairy. Spikes 2-4. Glumes lanceolate. 



Join t grass. 

 % Through the summer. In damp soils, common. 



8 P Vagixatum. Stem creeping, glabrous, branching. Leaves linear, 

 short, the sheaths of the upper leaves longer than the joints. Spikes 1-2, one 

 of them s*'ssile. 



% 1 hrough the summer. Damp soils, low country. 12-18 in. 



Genus X CERESIA. 



Glumes 2, l-flowerod, witli tlie e.xlerior one longer and bi- 

 fid at the summit. Pr//rcE 2, a little smaller than tlie glumes. 

 Spikes numerous. Flowers in 2 rows, under a wide, mem- 

 branous racliis. 



1 C Fi.uiTAXS. Stem procumbent, creeping, assurgent, glabrous. Leaves 

 8cribrou.>j, 2-3 inches long, sliizhtly glaucous hencatli. Sficalfis hairy at the 

 base. Sjjike* numerous, 20-30, recurved. Rachi.^ with the Howers arranged 

 on the upper surface. Glumes dotted, white. Fale<e equal, the interior one 

 flat, the exterior convex. 



O Sept. — November. Swamps. 1-3 ft. 



Gexus XI AULAXANTHUS. 



Glumes equal, lanceolate, 1 -flowered, nerved. PalecB 2, 

 nearly equal, the exterior concave, the interior flat. 



1 A CiLiATCS. Stem erect, glabrous, compressed towards the base. — 

 Z-eotfs lunar, ciliate, glabrous. Sheath ciliate, hairy at the throat. Glumes 

 villous. Falett brown, nearly black when mature. 



% Sept— Oct. Pine bi.rrens. 1-2 ft. 



2 A RcFi-s. Stem erecf, larger than the preceding. Leaves glabrous. 

 Panicle large. Glumes covered with long, reddish brown hair. 



%■ Aug. — Sept. Damp soils. 2-3 ft. 



GE.Nrs XII CENCHRUS. 



Involucre l-3.flowered, many parted, bristly. Glumes 2, 

 2-fl()wered, e.xterior ones smallest, the exterior floret sterile, 

 the other perfect. FalccE 2, unawned. 



