'792 Obdbb 156. — aKAMINE^. 



Iva. smoothish, on sheaths more or less hairy or almost smooth ; pan. large, 6 to 

 10' long, branches subsirapfe, whorled ; splkeleta smooth, lance-ovate, much com- 

 pressed, 2-edged, 1' long, i as wide, 8 to 12-flqwered; lower glame 3, upper B- 

 veined; lower pale 1 to D-veined, much larger than the strongly 2-keeled upper, 

 with scarcely any awn. — (D Cultivated at the South (in 1857) from seeds distri- 

 buted by the government, but proved no better than our Chess. ■]■ Pera 



5 B. ciliatus L. Culm erect, smooth, 2 to 4f high; Iva. flat, some pubescent, 6 

 to 12' long, on sheaths more or less pilous with deflexed hairs ; pan. large, erect, 

 5 to 8' long, finally nodding, branches in 2s and is, compoimd ; spikelels at first 

 lance-fusiform, 7 to 11-flowered, the fls. soon separating ; glume lower 1, upper 3- 

 veined; pales compressed-oarinate above, silky-haired near the margins, twice 

 longer than the straight awn. — 2{ Damp woods along rivers, U. S. and Can. Jn., 

 Jl.' (B. Canadensis Mx. B. pubescens Muhl. B. purgans, Ed. 2.) 



p. PURGAKS. Pan. more open; spkL sUky-hairy all over. — Mid. and S. 

 States. 



6 B. teotoram L. Culm slender, 1 to 3fJ pubescent above ; Ivs. pubescent i 

 sheaths ciliate with few long hairs ; pan. compound, at length 1-sided and nod- 

 ding; pedicels capillary; spikelets linear-dbhng, minutely downy, about 5-flowered; 

 glumes lower 1-, upper 3-veined ; lower pale 3-veined, carinate, scarious-edged, 

 lamce-subulate, scarcely as long as its awn. — CD N. York (Sartwell), Penu. (Jack- 

 son). (B. Bterilis Torr.) § 



31. TRICUS'PIS, Beauv. (Lat. tres, ttree, cuspis, a point ; refer- 

 ring to tlie structure of the lower pale.) Spikelets terete or tumid, 3 

 to 9-flowerecl, upper flower abortive ; glumes 2, unequal, awnless ; pales 

 2, the lower larger, hairy-fringed along the keel and the 2 lateral veins, 

 and ending in 3 short cusps or mucrones (the projecting veins and mid- 

 vein) and 2 intermediate teeth, upper pale 2-toothed ; stamens 1 to 3 ; 

 stigmas plumous ; caryopsis smooth, free, 2-horned. — Erect, simple. 

 Pan. mostly with racemous branches. 



1 T. seslerioides Torr. False Eed-top. Culm hard and firm, glabrous, i to 

 5f high; Ivs. glabrous, linear, involute when dry, sheaths hairy at the throat; 

 pan. open, loose, 8 to 1'2' long, the slender branches at length spreading; spikl. te- 

 retish, lanceolate, about 5-flowerod, purple, 2 to 3" long ; cusps of the lower pale 

 very short.- — 2{ A splendid grass, in dry fields, N. Eng. to 111. and S. States. 

 Aug., Sept. (Poa Mx. Windsoria poseformis Nutt. Uralepis cuprea Kunth.) — 

 A variety has smaller, 3 to 5-flowered, pale purple spikelets and flexuous branches. 

 Another var. has the spikelets white. 



2 T. amblgiia Kunlh. Culm strictly erect, 2 to 4f high, slender and firm, 

 glabrous as well as the linear, convolute-filiform Ivs., and the sheaths whidli are 

 scarce half the length of tho internodes; pan. contracted, small, 3 to 5' long ; spike- 

 lets few, subsessile, ovate turgid, 6 to 7 -flowered, the fls. at length divaricate, more 

 or less purple. — If Car. to Ga. and La. SpkL not longer, but much thicker than 

 in No. 1. Sept. (Poa, Ell.) 



3 T. Btricta. Glabrous ; culm slender, flrm, erect, 3 to 6f high ; pan. very strict, 

 spike-like, dense ; spkl. sessile, flat, nearly as broad as long, 7 to 9-flowered ; glumes 

 lance-linear, much longer than the pales, about as long as the spikelets. — y Miss. 

 and La. Lvs. very long, flat. Pan. about 6' long, 6" wide. A singular grass. 

 CWindsoria Nutt.) 



32. URAL'EPIS, Nutt. Sand Grass. (Gr. 6vpd, tail, Aem^, a scale ; 

 a characteristic name.) Spikelets 2 to 5-flowered, fls. distant; glumes 

 2, shorter than the flowers, unequal, awnless ; pales 2, very unequal, 

 both conspicuously fringe-bearded along the 2 or 3 veins, the lower 2- 

 cleft, with the mid vein produced into a short, straight awn between the 

 2 segments ; upper 2-keeled. — Culms decumbent, branched. Pan. small 

 the branches racemed. 



1 XT. purpurea Nutt. C^spitous; culms , procumbent at base, bearded at the 



