OKDER CXLII. — GKAMIXACK/K. 570 



terminal, erect. Glumes acute, lanccDlate, smooth. — Car. and north- 

 Avai'd. 



24. P. vis'ciDUM, (Ell.) Ste77i erect and decumbent, branchinif, very 

 pubescent and viscid at tiie joints. Leaves bliirhtly cordate, pubescent, 

 ciliate ; sheath viscid. Panicle expandinj^. Flowers pubeseent, obo- 

 vate. Ghimes 2-flowcred. Palece of the sterile floret very small. — 1i. 

 June. Damp soils. 2 — 4 feet. 



2.5. P. ciliatifo'lium, (Kunth.) (P. cUiatum.) Stem decumbent, te- 

 rete, f^labrous. Leaves lanceolate, ciliate; sheatli glabrous, ciliate. 

 Glumes 2-flowered, with an Rcoessory glume. J'ale<c of the neutral 

 floret suiall. — 2f . March — April Damp soils. 4 — lU inehes. 



26. P. ensifo'lium, (Ell.) Stem erect, .'^lender. Leaves ovate-lanceo- 

 late, acute, glabrous ; sheath sliort, glabrous Flowers small, pubes- 

 cent. — If. April — May. Damp soils. 12 — 18 inches. 



27. P. barbula'tum, (Mich.) Stem erect, usually geniculate, -with the 

 ioints bearded, branching at the base. L^eaves ovate-lanceolate, g!a- 

 orous, expanding; sheath glabrous, ciliate. Glumes 2-flowered, pubes- 

 cent. PalecB of the perfect flower equaling the glumes; of the sterile 

 flower only one, small. — If. April — July. Damp soils. 10 — 15 

 inches. 



28. P. puBEs'cENS, (Lam.) Stem erect, much branched, pubescent. 

 Leaves lanceolate, ciliate, pubescent. Stipxdes bearded. Glumes 2- 

 flowert^d, obovate. Palece of the perfect flower longest. — If. July — 

 Aug. Shady woods. 1 — 2 feet. 



29. P. sph^rocar'pum, (Ell.) Stent erect, terete, glabrous. I^eavcs 

 linear-lanceolate, acute, glabrous, ciliate at the base. Panicle expand- 

 ing. Flotvers small, pubescent. Fruit globular. — If. April — May. 

 Middle Geo. 12—18 inches. 



30. P. angustifo'lium, (Ell.) S/em slender, glabrous. Leaves lin<-ar- 

 lanceolate, ciliate at the base, scabrous above, glabrous beneath. Floic- 

 ers solitary, pubescent. — 2f . May — June. Shaded soils. 1 — 3 feet 



31. P. HETERorHYL'LUM, (Bos.) (P. multijlonwi, Ell.) Stem erect, 

 glabrous. Leaves broad-lanceolate, pubescent at the base and ciliate, 

 slightly undulate. Flowers in a much branched panicle, small, pubes- 

 cent.— If. May — July. Shaded soils. 2—3 feet. 



32. P. melica'rium, (Mich.) Stem slender, glaV<rou3. Leaves long, 

 narrow, ghibrous. Panicle contracted, slender. Glumes 2nowtrcJ, 

 membranaceous, nearly equal. — If. April — June. Car. and Goo. 



33. P. an'ceps, (Mieh.) Stem compressed, branehing. penieulate. 

 Leaves hairy; sheaths hairy, longer than the joints. Panicle expaml- 

 ing, turning to one side. Glumes 2 — 3 flowered, perfect auid sterile. 

 Plilece shorter than the calyx. — If. Aug.— Nov. Wet soils. Com- 

 mon. 2 — i feet. 



34. P. capilla're, (Griis-i.) {P. strif/»:nim, Ell.) Stem nssurgrnt, 

 branched, villous. Leaves lanceolate, ciliate, villou.«^. Panicles large. 

 Glumes 2-flowere<l, obovate. Palex of the sterile florets very small. — 

 If. April- May. Damp soils. 12—16 iiiche!». 



35. P. scopa'uium, (Lam.) Stem erect, villous. Leaves glabri>u9 <.n 

 the upper surface, 3—6 inches long, 1—2 wide, pubescent beneath. 

 Flowers few, large. Ghimes 2 flowered, pubeseent, witli an acce»->ory 

 valve. Palcoi of the perfect floret larger than those of the sterile one. 

 —If. April — May Shady places. 2 — 3 feet. 



