IOWA ACADEMY OP SCIENCE 
107 
Genus Carex L. Sp. PL 972 (1753). 
Grass like Cyperaeeae, perennial by rootstocks. Culms mostly 3- 
angled. Leaves 3-ranked, tbe upper elongated, or very short (bracts) 
and subtending the spikes of flowers, or wanting. Flowers monoecious 
or dieocious, solitary in the axils of bracts (scales), Spikes either 
wholly pistillate, wholly staminate, or bearing both staminate or pis- 
tillate flowers (androgynous). Perianth none. Staminate flowers of 
three stamens, the filaments filiform. Pistillate flowers of a single pistil 
with a style and 2 or 3 stigmas, borne on a very short axis in the axil 
of a sac-like braetlet or second bract called the perigynium (utricle), 
which completely encloses the achene. 
A vast genus of more than 1,000 widely distributed species, mostly in 
the temperate zone. 
(The classical Latin name of obscure signification; probably derived 
from the Greek Keiro, to cut, on account of the sharp leaves of many 
of the species). 
1 — Carex Asa-Grayi Bailey, Gray’s sedge. 
Br. Ulus. Flora, i, 293, fig. 576; Gray’s Man., 6th ed, 592; Arthur, 
Cont. FI. Ia, iii; Hitchcock, PI. Ames, 524; Cratty, la. Sedges, 335; 
“Brendel, FI, Peoriana, 63.” 
C. Grayi Carey, Sill. Jour., 2nd ser., iv, 22 (1847), not C. grayana 
Dew. (1824) ; Gray’s Man. 7th ed., 253. 
Infrequent, swamps and marshes, along Skunk river south of Mt. 
Pleasant. June 17, ’08. 
2 — Carex lupulina Muhl., Hop sedge. 
“Schk. Riedg., ii, 54 (1906) ;” Br. Illus. Flor, i, 294, Fig. 678; Arthur, 
FI. Iowa, 34; Hitchcock, PI. Ames, 524 ; MacMillan, Metas. Minn. Val., 
129; Tracy, FI. Mo., 93; Bot. Surv. Nebr., iv, 45; Fink, Iowa Acad. Sci., 
iv, 105; Cratty, Iowa Sedges, 336; Shimek, Ia. Geol. Surv., xvi, 169; 
‘‘Brendel, F3. Peoriana, 63. 
Frequent in swampy ground. Along Skunk river and Big creek in very 
swampy places. June 16-18, ’09. 
3 — Carex comosa Booth Bristly sedge. 
Br. Illus. FI. i, 301, f. 698; Gray’s Man. 6th ed., 596; 7th ed. 251; 
Arthur, Cont. FI. Ia., v; MacMillan, Metas, Minn. Val., 126; Bot. Surv. 
Neb. iii, 16 ; Cratty, Ia., Sedges, 338. 
