GRAMINE^E. 535 



Division IV. ORYZEM. — Spikelets of Agrostidese, but sterile glumes more than 2, 

 often partly or all abortive, and palea furnished with a midrib. — Spikelets jointed at the 

 base, deciduous. 



17- ORYZA, L. 



Spikelets laterally flat-compressed ; 2 sterile glumes developed, small, 2 abortive, fertile 

 chartaceous, usually awued. Stamens 6. — Spikelets paniculate. 



35. O. latifolia, Desv. Stout ; leaves lanceolate-acuminate, scabrous : ligule short ; 

 panicle spreading : inferior branches whorled ; fertile glume hispid, awned. — Kth. Rev. 

 I. 4. — 0. sativa, L., has narrower leaves, a produced ligule, the panicle more contracted, and 

 the down of the flower soft. — Hab. Trinidad !, Cr., at Caroni : [Southern United States to 

 Brazil]. 



18. LEERSIA, Sw. 



Character of Oryza, but all sterile glumes abortive, and flowers awnless, 6-1-androus. 



36. li. hexandra, Sw. Panicle spreading : flowers elliptical -oblong , 6-androus, hispid 

 along the keel of the glume. — Kth. liev. t. 1. — L. mexicana, Kth., australis, R. Br. mauri- 

 tanica, Salzm. !, coutracta, Ns.— Leaves variable in breadth. — Hab. Jamaica (Sw.) in 

 ditches; Dominica!, Imr. ; Trinidad!, Cr., in savannahs; [Florida! to Buenos Ayres!, 

 Algeria ! to the Cape !, East Indies !, to Australia]. 



37- I«. monandra, Sw. ! Panicle narrow, at length spreading, somewhat one-sided : 

 branches distant : flowers semiovate-roundish, pointed, 1-androus, glabrous along the keel of 

 the glume. — Spikelets pale, often imbricated, i'" long. — Hab. Jamaica !, Sw., in calcareous 

 woods ; [Cuba ! ; Texas !, Mexico]. 



19. LUZIOLA, Jut*. 



Spikelets monoecious in distinct panicles : terminal panicle $ , axillary <j> . All sterile 

 glumes abortive, fertile membranaceous, awnless. Stamens 6-11. "Embryo large." — 

 Ligule produced. 



38. Ii. peruviana, Juss. Mey. Esseq. t. 2. Stem creeping at the base or floating ; $ 

 flowers 2'", £ 1'" long. — Hab. Trinidad !, Lockh. ; [Mexico to Brazil !]. 



Division V. PHALARIBE2E. — Spikelets l-flowered or unisexual 1-few-flowered. 

 Stigmas projecting from the summit of the flower. 



20 OLYRA, Z. 



Spikelets l-flowered, monoecious, $ devoid of sterile glumes ; $ flower cartilaginous : its 

 2 sterile glumes herbaceous, often tailed at the summit. " Caryopsis free : embryo minute." 

 — Leaves usually broad, often oblique at the base ; spikelets pedicellate, jointed at the 

 base : $ flower included within the sterile glumes. 



* Spikelets paniculate, inferior $ . 



39. O. latifolia, L. Stout, branched below : nodes contracted ; leaves ovate-oblong, 

 ovate-lanceolate (or lanceolate), acuminate ; panicle spreading : all branches terminated by a 

 single ? spikelet, most $ below it ; spikelets glabrous ; $ glume tailed with a bristle, $ 

 sterile glumes subulate-tailed : tail of the inferior longer : flower ellipsoidal, glabrous, 

 shining-polished. — SI. t. 64. /. 2. Trin. Ic. t. 346.— O. paniculata, Sw.— 4'-15' high, 

 variable in the $ flower being ebony-white or more rarely black. 



a. Leaf-sheaths more or less hairy : ligule short, ciliate. 



fi. arundinacea, Tr. Leafrsheaths glabrous or glabrescent : ligule produced, glabrous. 

 Hab. Jamaica !, all coll. (o, /3), common in woods ; Antigua!, Wullschl. 03), Dominica!, 

 Imr. (jB) ; Trinidad !, Cr. (&) ; [Cuba! and Mexico ! to Brazil !]. 



40. O. semiovata, Tr. Erect, flexuose at the base : inferior nodes prominulous and 



