CYPERACEA2. (SEDGE FAMILY.) 517 
Stamens (1, 2, or mostly) 3. Perianth none. Style 2-3-clefl, 
deciduous. Achenium lenticular or triangular, naked at the apex’ 
— Culms triangular, simple, leafy at the base, and with 1 to sev- 
era! leaves at the summit forming an involucre to the umbel. Pe¬ 
duncles unequal, sheathed at the base. (W«p OS r, the ancient 
name.) 
§1. Pvcreus, Beau v.-Style 2 -deft: achenium flattened: otherwise 
as § 2. 
f inn flav ® scens * L - Stamens 3; spike linear, rather obtuse, 
14 - 30-flowered, clustered at the end of the 2-4 very short rays (pe- 
duncles); scales obtuse, straw-yellow; achenium shining, minutely 
wrinkled transversely, orbicular. U _ Low grounds near the coast 
Aug. _ Culms 4' -10' high: spikelets 5'-8' long. Involucre 3-Ieav- 
ed, very unequal. 
2. C. ctiandrus, Torr. Stamens 2 ; spikes lance-oblong, rath¬ 
er acute » 14-24-flowered, scattered or clustered on the 2-5 very 
short or unequal rays ; scales oblong , rather obtuse , brown-margined; 
achenium dull , oblong-obovate. — Var. castAxeus, Torr. (C. casta- 
neus, Bigel.) : scales oblong-lanceolate, shining, close, chestnut brown ; 
achenium round-obovate, minutely wrinkled; stamens sometimes 3 
m the upper flowers. — Low grounds near the coast; the var. com¬ 
mon through the interior. Aug., Sept. — Resembles No. 1. 
3. C. IVuttallij, Torr. Stamens 2; spikes lanceolate-linear, 
acute, very flat (1' long), many-flowered; crowded on the few very 
short (or some of them distinct) rays ; scales oblong-lanceolate , acute, 
yellowish-broicn , rather loose ; achenium oblong-obovate, very blunt* 
dull. lj. ?—Salt marshes, from Massachusetts southward Auc — 
Culms 4'- 12' high. 4 5 6 ' 
4. C. Cleaveri, Torr. Stamen J; culm bristle-form (4' high) 
terminated by a single and similar erect involucral leaf and a solitary 
lance-linear 10 - 12-flowered spike (£' long); scales linear-oblong, 
rather acute, 3-nerved; achenium oblong-obovate, much compressed, 
minutely dotted. <2) ? (C. tenellus ? Torr. Cyp ., not of L. C. min¬ 
imus ? JYutt.j not of L.) — Monmouth county. New Jersey, Dr. Cleaver 
(only). 
§ 2. Cyperus proper. — Style deleft: achenium triangular : spikes 
many-flowered , only the lowest scale empty , the joints of the axis nar¬ 
rowly wing-margined or naked. 
* Stamen 1 : umbel contracted or sessile. 
5. C. inflexus, Muhl. Dwarf (2'-5' high), in tufts; spikes 
o ong-Jinear, about 8-flowered, collected in 2-3 ovate heads either 
sessile and clustered or short-peduncled ; scales oblong, tapering into 
a long recurved point; involucre 3-leaved, very long. (J) —Sandy 
44 
