18 BOTANICAL GAZETTE. 



C . retroflexus, but more slender, with shorter and thicker spikelets, and narrcnvtr heads. 



Cypenis rylimlricus, n. sp. Umbel 8-6-rayed, erect, simple; heads simple, cylindri- 

 cal, (1-1 J^ inches long,); spikelets very numerous, spreading, lanceolate, T-D-tlowcred; 

 scales oblong, obtuse, 7-9-nerved, the 2 lower ones empty, the 2-3 upper ones abortive; 

 nut acutely triangular, oblong; rachis slender, narrowly winged; culms (1-8 feet high,) 

 triangular, smooth, as long as the broadly linear smoothish leaves; leaves of the invo 

 luci'e 3-6, longer than the umbel. — Collier's Key at Marco Pass, South Florida. — Near 

 G. cephnlanthus, Torr. and Hook. 



Scirpus f Cuhensin, Poepp and Kunth. Culm acutely triangular, leafy at the base 

 (8-10 inches high); leaves longer than the culm, linear; involucre very long, 5-leaved; 

 spikes obovate, compressed, 12-flowered, closely packed in a compound globular sessile 

 terminal head ; scales rigid, loose, obovate-oblong, tapering to a stout spreading point, 

 13-nerved ; stamens 3; style long, deeply 2-parted ; nut ovate-lanceolate, concavo-con- 

 vex, acuminate ; bristles none. — New Orleans, {Dr. Ilale). 



Trichelostylis miliacea, Nees. Culm weak, compressed-4-angled (6-12 inches high) ; 

 leaves straight, erect, ensiform ; umbel decompound, widely spreading, manj' times 

 longer than the 2 subulate leaves of the involucre; spikes small, (I line in diameter), 

 globular; scales oblong, obtuse, 3-nerved; nut pale, obovate, slightly roughened. {Scir- 

 pus, L.. Fimhristylis, Vahl.) — Ditches, &c., Apalachicola, Florida. 



Isolej)is cnrinata. Hook and Arn. Culm setaceous (3-6 inches higli), slightly com- 

 pressed, furrowed, with a single setaceous leaf at the base; spike solitary, sub-lateral, 

 ovate, 6-8-flowered ; scales ovate, acute, strongly keeled, twice as long as the short 

 acutely triangular roi ghish nut. — New Orleans, {Dr. Hale). 



Lcersia monandra, Swartz . Panicle nearly simple, spreading, exserted; spikelets 

 minute, ovate, acute, compressed, glabrous; stamen solitary; culm slender (2-3 feet 

 long), smooth ; leaves broadly linear, rough above and on the margin. — South Florida, 

 (Herb. Thurher.). 



Pharus latifoliris, L. V Leaves oblong, acute, rough beneath, longer than the 

 petiole-like sheath ; lower palea of the pistillate spikelet acute, downy on the back, 

 twice as long as the lanceolate glumes. — Orange Lake, Florida, {Herb. Thurber.). 



Sporobolus purpurascens, Hamilton. Culms tall (2-3 feet) branching; leaves long, 

 narrow-linear, slightly scabrous above, mostly hairy at the base; ligula a villous ring; 

 panicle racemose, simple, the short spreading branches whorled; flowers short-pedi- 

 celled, smooth ; glumes unequal, the upper one as long as the palea3, twice as long as the 

 lower one. — Wet sandy places, subject to tidal overflow. Jew-fish Key, South Florida 



Mulilenbergia co'.'ipttosa, n. sp. Culms tufted, simple (2 feet high); leaves short 

 (4-6 inches long), narrow-linear, flat; panicle terminal, long-peduncled, sparingly 

 branched, the straight setaceous rough branches erect; palese 3-nerved, bearded at the 

 base, 4 times as long as the oval obtuse or denticulate glumes, and equalling the stout 

 rough awn. — Dry pine barrens, near Apalachicola, Florida. July 4. — Resembles 31. 

 trichopodes. 



SderaeJme Arkamana^ Ton-. Annual, low, tufted; culms erect (6-12 inches high), 

 branching; leaves narrow. Hat, pubescent, panicle contracted (2-6 inches long); glumes 

 rigid, hispid; lower pale* rigid, rough-awued; stamens 2. — Shell-banks, near Apalachi- 

 cola, Florida. April. 



Aristida simp)licifiora, n. sp. Culms filiform, erect (2 feet high), sparingly branch- 

 ed; leaves narrow-linear ; racemes simple, very slender, straight (6-9 inches long); flow- 

 ers scattered, on short pedicels, single, or the lower ones by pairs ; glumes neai ly ecjual, 

 awn-pointed {^% lines long), the outer one longer than the palese ; awns widely spread- 

 ing, the lateral ones as long as the glumes, straight, the middle one curving in a semi- 

 circle at base.- — Damp pine barrens. West Florida. 



Aristida gyraus, n. sp. Csespitose, glabroils; culms simple, filiform (1 foot high). 



