GRAMINEiE. . 557 



45. TRICHOLjENA, Schrad. 



Inferior sterile glume minute, or wanting, second and third membranaceous, including 

 the chartaceous flower. — Spikelets villous-hairy, pedicellate, jointed at the base, 



146. T. insularis, Gr. Stout ; leaves glabrous, linear-acuminate, or lanceolate-linear ; 

 branches of the panicle whorled : pedicels unequal, geminate .- spikelets lanceolate, acumi- 

 nate, awnless ; lowest glume minute, glabrous, 2 superior sericeous-woolly ', equal, the third 

 devoid of apalea; flower acuminate. — SI. t. 14. f. 2; Trin. Ic. t. 220. — Andropogon, L. 

 Panicum leucophseum, Kth. P. Duchassaingii, Steud. Trichachne sacchariflora, Ns. (ex 

 Sieb. Mart. 30 : exclus.foliis). Saccharum polystachyon, Sieb. (non Sw.). — Panicle 6"-10", 

 spikelets 2"'-3'" long. — Hab. Jamaica !, Linds., Waters, March ; S. Kitts !, Els., 

 Antigua !, Wullschl., Dominica !, Imr. ; [Texas ! and Cuba ! to Patagonia !]. 



147. T. saccharoides, Gr. Stout ; leaves linear-acuminate : upper side hairy ; spici- 

 form racemes long, filiform, half-whorled in a corymbiform panicle : pedicels short, single, 

 distant : axis glabrous, at length flexuose : spikelets lanceolate, acuminate, awnless ; lowest 

 glume wanting (or abortive), second woolly along the margin, with long, sericeous hairs, 

 third shorter, glabrous, devoid of a palea ; flower pointed. — Kth. Rev. t. 30 ; Trin. Ic. t. 

 107. — Panicum, Kth. Paspalum, JV*. Saccharum polystachyon, Sw. — Spikes numerous, 

 10"-6", spikelets (the wool excluded) 1'" long. — Hab. S. Kitts", Dominica !, Imr. 



Subtribe 2. SACCHAREM. — Fertile flower membranaceous, not indurated : sterile 

 glumes usually of firmer texture. 



46. LAPPAGO, Schreb. 



Spikelets glomerate-racemose, hermaphrodite, flat-convex, awnless. Lowest glume want- 

 ing, second minute, membranaceous, third rigid, glochidiate-muricate, devoid of a palea. 

 — Annual grasses. 



148. Ii. aliena, Spreng. Raceme slender : spikelets elliptical-lanceolate, 2(-l) in each 

 glomerule, one usually imperfect ; bristles ^-seriate, subequal, about as long as the transverse 

 diameter of the spikelet. — Kth. Rev. t. 120. — L. racemosa, var. Kth. Tragus occidentalis, 

 Ns. ! T. Berteroanus, Schult. — Spikelets 1'" long, smaller than in L. racemosa, Schreb., 

 which has unequal, 7-seriate bristles. — Hab. Jamaica!, Pd., Al. ; Antigua!, Wullschl. j 

 [Texas ! to Brazil ! ; trop. Africa to the Cape ! ; Arabia ! to East Indies !]. 



47. MANISURIS, Sw. 



Spikelets in a simple, jointed spike, awnless, alternately fertile and neutral (or " $ "), the 

 fertile sunk into the excavated axis. Sterile glumes in the latter 2, rigid, exterior placed 

 against the palea of the small, membranaceous flower; steri te spikelets often reduced to 2 

 leathery glumes. — Annual grasses ; spikes terminal and axittary. 



149. M. granularis, Sw. Erect, pilose at the sheaths; exterior glume of the fertile 

 spikelet concave-hemispherical, cartilaginous, densely reticulated-scrobiculate. — SI. I. 80. — 

 Cenchrus, L. — 1'-3' high ; spikes 6"'-8'" long : peduncles included within leaf-sheaths , 

 reticulated glumes whitish, about I?" diatn. — Hab. Jamaica !, Macf., Wils., March, on 

 dry limestone ; Trinidad !, Sch. ; [southern United States ! and all tropical countries], 



48. TRIPSACUM, I. 



Spikelets monoecious, awnless, in jointed spikes, <J superior, geminate, ? inferior, single, 

 wholly imbedded into the excavations of the axis. Exterior <? glume leathery, interior char- 

 taceous : membranaceous flowers 2. Exterior $ glume cartilaginous, interior thinner, third 

 neutral, membranaceous : n*Qwer single. Anthers opening with pores. — Tall, perennial 

 grasses ; spikes terminal, single or digitate. 



150. T. xnonostachyum, W. Stout, branched; leaves lanceolate-acuminate; spike 

 solitary cylindrical at the base : S spikelets distichous ; exterior $ glume 7-$-nerved 



2 o 2 



