ORDER CXLII. — GRAMINACEiE. bbO 



terior palea Avith the midrib rrrovn.—Q. Through the summer. Moint 

 cultivated hinds. 6 — 18 inches. 



7. P. Link'h. (Kunth.) {P. tenclla, Ell.) ,S^w dcrunihcnt, i,'l:ihrous. 

 Leaves subulate, scabrous on the u). per surface ; sheath hairy at the 

 throat. Panicle expanding, with verticillate branches ; exterior paU-a 

 purple, 3— 5-nervcd.— 0. Through the sununer. Cultivated gnninda. 

 Common. 6 — 12 inches. 



§ 2. Spikelets paniculate, fewfowcrcd, rather remote. 



8. P. an'nda, (L.) Ste7?i glabrous, procumbent, geniculate. Lmvca 

 glabrous. Panicle diffuse; spikelets usually 4— 5-flowcred. Glumrt 

 slightly pubescent.—©. Feb.— April. Cultivated grounds. C— 8 in. 



9. P. viu'iDis, (Schr.) Stem erect, oblique at the base, striate, gla- 

 brous. Leaves glabrous, linear, flat. Panicle diffuse, with 3 or 4 branch- 

 es at each joint. Glumes acute, margins scarious, white ; spikelets ." — 

 5-flowered, woolly at the base. — 11- May — June. Common. 2 — 3 f<-et. 



10. P. FER^TiLis, (Host.) {P. an r/iist /folia, Wahl.) Sinn glabr»»u.s 

 erect. Xmi'^.s linear, glabrous, involute, upper ones broadest. Panicle 

 crowded; spikelets usually 4-flo\vered, villous at the base. PaU<n 

 tinged with purple, villous at the base. — If. May — June. Common, 

 1—2 feet. 



11. P. spectab'ilis, (Pmsh.) {R. refracta, Ell.) Stem erect, terete, 

 glabrous. Leaves slightly hairy. Panicle diffuse, large ; spikelets 15 

 . — 20-flowered ; exterior palea 3-nerved. — IX. August — Sept. Damp 

 soils. 2 feet. 



12. P. ten'uis, (Ell.) Stem somewhat compressed, much brancht-d, 

 glabrous. Leaves linear, long, scabrous; throat of the sheath hairy. 

 Panicle diffuse, capillary ; spikelets 1 — 3 flowered. Glumes glabrnus, 

 Palece glabrous, the exterior one keeled. — 2^. Aug. — 8ej>t. Upper 

 Car. 12—18 inches. 



13. P. micran'tha, (Schult.) (P. parvijlora, Ell.) Stem simple, de- 

 cumbent, compressed, leafy. Leaves distichous, flat, glabrous ; -hi-ath 

 glabrous. Panicle diffuse, capillary; spikelets gL-n.rally o-llow- rfd ; 

 florets obtuse, caducous. — If. July. Shady woods. Middle (■.iioliua 

 and Georgia. 



14. P. autumna'lls, (Muhl.) Stem erect, glabrou.". Leaves slightly 

 dcabrous, flat. Panicles dift'use ; sj)ikelet3 generally y-lloweml. 

 Glumes unequal; exterior palea obtuse, 5-nerved. — 1(. Aug. — Sept. 

 Middle Car. and Geo. 12 — 18 inches. 



15. P. nit'ida, (Ell.) Stem erect, glabrous?. L'-aves linear; throat ol 

 the sheath slightly hairy. Panicle diffuse, capillary; spikrlet.-* 7 — y 

 flowered. Glumes compressed; exterior palea 3nerved, tran.«*pareiit 

 — 1^. Through the summer. Cultivated lands. 12 — 18 indie.-'. 



16. P. confer'ta, (Ell.) /S^em erect, geniculate, terete, swollen nt tlu 

 joints. Leaves glabrous, flat. Panicles terminal anil axillary, erect 

 spikelets 8-flowered, smooth ; exterior palea with colored vein?. — "it 

 July — Aug. Middle Car. and Geo. 2 — 3 feet. 



17. P. FLu'iTANS, (Scop.) {Glyceria fuitans, Brovrn.) Stem erv<r 

 glabrous. Leaves scabrous on the upper surface; eluatlis glubrou* 

 with large stipules. Panicle branching; spikelets se.*silo, U— lU-flow 

 ered. Glumes membranaceous, smalkr than the pahrc ; oxtrrior pnlca 

 7-nerved, obtuse.— 2^. May — Aug. Upper districts. 1—2 feet. 



