530 GBAMINBiS. 



Sect. 1. Phragmites, Tr. — Glumes setaceous-acmmnate, ercept the two lowest shorter^, 

 ones : flowerf' hermaphrodite or the lowest 3. Wool covering the internodes of the 

 rhachis. 



9. A. occidentalis, SieJi. ! Tall, herbaceous ; leaves, linear-aeuminate, slightly sca- 

 brous at the margin ; ligular harder shortly and equally dliate ; panicle large, pale-rusty ; 

 spikelets 3-6-flowered; 3 lowest glumes unequal, bluntish, minutely S-dentate; lowest 



flower monandrous : its glume equalling the wool, wore than twice as long as the inferior' 

 ( sterile glume, or little exceeded by the iermaphrodite flowers. — SI. t. 67. — Phragmites mar- 

 tinicensis, Trin. Eemirea diffusa, Sieb. Mart. 31 ! — Habit of J. altissima, Beuth. (Phr. 

 gigantea, Gay), bat leaves narrower, 5"'-8"' broad at the base, and ligule not unequally fim- 

 briate; structure of A. Phragmites, L., but 2 lowest glumes less pointed, wool a little 

 shorter, <? flower 1-androus. Stem 10'-20' high, panicle 3', spikelets 6"'-8"' long.— Hae. 

 Jamaica!, Pd., F«&., in wet places, along rivers; Trinidad!; [French islands!; Mexico!, 

 to Brazil !j. 



Sect. 3. Gynerium, Kth. — Glumes aumless, acuminate, delicate : flowers dioecious. Wool' 

 covering the lower part of the flowering glumes. 



10. A. saccharoides, Gr. Tall, arborescent ; leaves lanceolate-acuminate, serrulate- 

 scabrous at the margin ; p%(iicle large, very woolly, one-sided ; spiielets %-jlowered ; glumes 

 in $ " lanceolate," in ^ narrowly linear-acuminate, the 3 lowest unequal, the longest equalling 

 the wool; ^flowers " 3-androus." — Hvmb. PL Equin,. t. 115. — Gynerium, Sumh. — Stem 

 i2'-16'high, "3"-3" thick at the base" (SI.); leaves 3'-4' long, 2" broad; panicle 2', 

 spiki'lets and spreading wool 4'" long. — Has. Jamaica!, Macf., in wet places; Antigua!, 

 Wullschl. ; Trinidad, Or. ; [Cuba ! and Mepco ! to Brazil !]. 



Sect. 3. Donax, P. B. — Fertile glumes 2-de>^tate, awned between the teeth, 2 sterile sub- 

 equal : flowers hermaphrodite. 



11*. A. Donax, L. Tall, arborescent; leaves lanceolate-acuminate, glabrous at the 

 margin ; panicle large, rusi;y-tawny ; spikelets S-2-flowered, included within the 3 sterile 

 glumes ; fertile glumes shortly awned, woolly below : awn erect, twice as long as the teeth ; 

 internodes of the: rhachis woolly only at the summit. — Reichenb. Ic. Germ. f. 1731. — Stem 

 10-30' high; leaves 1 "-IV' broad at the base: sheath often black at the summit. — Hab. 

 Jamaica !, March, Antigua !, Wullschl., probably introduced ; [Southern Europe ! to tropical 

 Asia !]. 



8. PLATONTA, Kth. 



Spikelets, 1-flowered > glumes coriaceous, 4 inferior sterile, devoid of a palea. Falea con- 

 vex, emarginate, coriaceous -. its 3 nerves obsolete, " little distant." Lodiculte 3. — Stout, 

 herbaceous grasses; leaves confined to the lower part of the stem : ligule produced; panicle 

 virgate, somewhat contracted ; spikelets ovate, numerous alofig its short branches. 



This genus, less related to Chusquga than to JJniola (and more distantly to Phalaris), is 

 placed here on the authority of Kunth's figure of tbe stigmas, which apparently resemble 

 those of Arando. 



13. P. virgata, Gr, (n. sp.) leaves lanceolate, shortly acuminate, scabrous at the 

 margin, exceeded by the stem ; panicle dense, rigid : axis and branches sulcate, densely pu- 

 bescent ; spikelets shiningrglabrpus, often longer than their pedicel ; glumes convex, mucro- 

 nate, the 3 lowest lanceolate, the 3 upper sterile ones twice as long, ovate-lanceolate, the 

 fertile ovate-oi'long, little exceeding the palea. — Stem 6' high, cylindrical, glabrous, 2'" 

 diam. ; leaves 3i'-2' long, 2" broad above the middle, long-tapering at the base; sheath 

 striate, glabrous : ligule ovate, blunt ; panicle 1' long, about 1" diam. ; branches thiokish, 

 spreading-erect, approximate, not whorled ; spikelets tawny, laterally compressed, Si'" long, 

 3 upper glumes 1^'" long, spreading. — Hab. Trinidad !, Cr., at Tocuche. 



9. ORTHOCLADA, P. B. 



Spikelets 3-1-fiowered : glumes. herbaceous, 3 inferior sterile. Palea compressed, herba- 

 ceous, membranaceous at the margin : its 3 nerves approximate along the dorsal keel. 



