* 
LI 
GRAMINEZ. (GRASS FAMILY.) 545 
(C. bullata, ÆU.) — Pine-barren swamps, Florida, and northward. — Culms 
13° - 2° high. Leaves narrowly linear, keeled, rather rigid. Perigynia occa- 
sionally nearly smooth. 
= = Perigynia smooth. 
73. C. riparia, Curtis. Sterile spikes 4-6, dark brown; fertile spikes 2- 
3, oblong-cylindrical, sterile at the summit (13’-2' long), on erect peduncles; 
perigynia ovate-oblong, obscurely nerved, tapering into a smooth 2-cleft beak, 
longer than the oblong brown awned scale. — Deep marshes, Florida to South 
Carolina. — Culms stout, 29 — 39 high, rough above, shorter than the broad (V) 
smoothish and glaucous leaves and bracts. 
74. C. bullata, Schk. Sterile spikes 2-3, long-peduncled ; fertile spikes 
1-2, oblong or oval (1' long), sessile, or on very short exserted peduncles ; peri- 
gynia globose-ovate, much inflated, strongly nerved, smooth and shining, slender- 
beaked, longer than the oblong acute scale. — Swamps, South Carolina, and 
northward. — Culms 1? - 13? high, shorter than the linear leaves and bracts. 
LI 
Orver 160. GRAMINE. (Grass FauILY.) 
Chiefly herbs. Stem (culm) mostly hollow and with closed joints. 
Leaves alternate, 2-ranked, narrow and entire. Sheaths open or split 
on one side, and usually prolonged into a membranaceons or fringed 
appendage (ligula) at the base of the blade. Flowers in spiked or 
‘panicled spikelets, consisting of 2-ranked imbricated bracts or scales; 
of which the exterior or lower ones, subtending one or more flowers, 
are called glumes, and the two inner ones, enclosing the 1-celled 1-ovuled 
ovary, and 1—11 (commonly 3) hypogynous stamens, are called palec. 
Perianth none, or composed of 1-3 minute hypogynous scales (squamu- 
læ). Anthers versatile, 2-celled. Styles 2-3, with hairy or plumose 
stigmas. Fruit a caryopsis (grain). Embryo placed on the outside and 
near the base of mealy albumen. — Root fibrous. 
: Y 
Tae L ORYZEÆ.— Spikelets 1-flowered, mostly imperfect. Gtumes none Pales 2. 
Stamens 1-11. 
 l LEERSIA. Flowers perfect, compressed, panicled. Palem unequal, ciliate. - £8 
2. ZIZANIA. Flowers moneecious ; the pistillate and staminate ones in the same panicle. 
59. LUZIOLA. Biomes teonieciowss the pistillate and staminate ones in separate panicles. 
3. HYDROCHLOA. Flowers moncecious ; the pistillate and staminate ones in separate spikes. 
60. MONANTHOCHLOÉ. Flowers dicecious, in terminal spikes. 
Tame IL. AGROSTIDEJE. — Spikelets 1-flowered, or with the pedicel of a second 
flower above. Glumes 2. Palew mostly 2, the lower one often awned. ‘Stamens 1- 8. 
Spikelets in open or closely spiked panicles. - 
n * Glumes united at the base, strongly compressed-keeled.- 
; Lower pales awned on the beck, the upper wanting. rer = te. 
