188 | CYPERACEAE 
ern coast of S pen. Fla. and the Keys.—(W. I., O. W.)— Although relatively 
small, this plant is conspicuous on account of the lines of starry t tufts which 
arise at intervals from the long rootstocks which are buried in the beach sand. 
19. SCHOENUS L. inne sie eae rush-like tufted herbs with short 
rootstocks. Leaves few, erect: blades elongate, involute, thus slender. Spike- 
lets blaek, in a dens ain terminal head subtended by a long e 
braet. Seales few, de imbrieate, long and narrow, acute. Peri 
3-6 scabrous or plumose bristles. Stamens 3. Ovary sessile: style doge 
deciduous. Stigmas 3. Achene short and stout, 3-angled, not tubercled.— 
About 60 species, mostly natives of the Old World. 
o 
th 
1. S. nigricans L. Plant densely tufted, up to 1 m. tall, glabrous: leaf- 
sheaths pei -brown or almost black a t the base; blades rigid: head of spike- 
lets 1-2 em. long: Dad linear- janceolar te 
in outline x 12 mm. long, dark-chestnut: 
scales irene or Tu a -subulate, or 
the lower ones broader, acute, scabrous- 
ciliolate on the keel near the apex: achene 
oval, 1.5 mm. long or rarely longer, T 
bot 
Ever rglados, pen. Fla. and L Keys A also 
Calif. —(W. I., Mez., O. W.)— , Bec- 
2 
SS 
NS 
sity herbarium, mae d in ie Torrey’s s hand- 
iting as havi 
ing Zale 1-3 eae in & head and perianth- -bristles as long as the achene 
or longer. S. cans has 5-15 spikelets in a head and very short or obtuse 
20. SCLERIA Berg. Annual or mostly perennial, caulescent herbs with 
horizontal rootstocks. Leaf-blades pd linear, usually very narrow. Fl 
n b 
ers monoecious. Spikelets in terminal or oth axillary and terminal clus- 
ters, the pue l-flowered, the staminate several-flowered: scales imbricate. 
erianth no Stamens 1-3 hers narrow. Ovary someti orne on a 
imes 
disk epoca ae. eis Pdl Stigmas 3. Achene erustaceous, bony, 
or enamellike, the body globular or slightly elongate, ours white or nearly 
so, smooth or variously roughened.—About 200 ui cies, most abundant in 
warm regions.—Spr.—fall, or all year S.—NUT-RUSH 
Achene with a circular, angled, or lobed disk (hypogynium) 
which often bears tubercles. 
Ache RE e-body smoo I. TRIGLOMERATAE. 
Achene-body papillose, wrinkled, or reticulate. II. SETACEAE. 
ER s ypogynium, sometimes narrowed into a stipe- 
Spikelets in a single terminal cluster. III. GRACILES. 
Spikelets in several separated clusters along the upper part 
of the stem. IV. VERTICILLATAE. 
I. TRIGLOMERATAE 
Hypogynium papillose-erustaceous. 1. S. triglomerata. 
Hypogynium with 8 or 9 tubercles. 2. S. oligantha. 
