SEDGE FAMILY. 285 
1. Uncinia microglochin (Wahl.) Spreng. Northern Uncinia. (Fig. 670.) 
Carex microglochin Wahl. Kongl. Acad. Hand], (IT. ) 
24: 140. 1803. 
Carex oligantha Boott, Il. 174. fl. 589. 1867. 
Uncinia microglochin Spreng. Syst. 3: 830. 1826. 
Perennial by short stolons, culms very slender, 
weak, 4/-12’ long. Leaves %//-1’’ wide, much 
shorter than the culm; spike 4//-8’’ long, usually 
pistillate for more than one-half its length; scales 
oblong-lanceolate, 1-nerved, deciduous; perigynia 
very narrowly lanceolate, 3’/-4’’ long, less than 
3,// thick, strongly reflexed in fruit; achene ob- 
long, obtusely 3-angled, much shorter than the 
perigynium; axis of the pistillate flower bristle- 
like, long-exserted beyond the orifice of the peri- 
gynium. 
Greenland to James Bay and British Columbia. Also 
in the arctic and mountainous parts of Europe and 
Asia and at the Strait of Magellan. Plant with the 
aspect of Carex pauciflora. Summer. : 
20. CAREX a Spa bleo7e nes 753. 
Grass-like sedges, perennial by rootstocks. Culms mostly 3-angled. Leaves 3-ranked, 
the upper elongated or very short (bracts) and subtending the spikes of flowers, or wanting. 
Flowers monoecious or dioecious, solitary in the axils of bracts (scales). Spikes either wholly 
pistillate, wholly staminate, or bearing both staminate and pistillate flowers (androgynous). 
Perianth none Staminate flowers of 3 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 bractlet or second bract called the perigynium (utricle), which completely encloses 
the achene. Achene 3-angled, lenticular or plano-convex. 
A vast genus, of more than r1ooo species, widely distributed, most abundant in the temperate 
zones. Besides the following about an equal number occur in the western and southern parts of 
North America. Specimens can only be satisfactorily determined when nearly or quite mature. 
The genus is divided into the two subgenera, EUCAREX (nos. I- 142) and VIGNEA (nos. 143-205). 
I. Staminate flowers numerous, in one or more terminal spikes, which are sometimes pistillate at 
the base or summit; or the spike solitary and the staminate flowers uppermost or basal, rarely dioe- 
cious; stigmas mostly 3 and the achene 3-angled or swollen (stigmas 2 and the achene lenticular 
or compressed in nos. 12-16; 49-59; 67-72); pistillate spikes stalked or sessile, the lower commonly 
stalked. Nos. 1-142. EUCAREX. 
A. PERIGYNIA MOSTLY LONG-BEAKED, I !4''-10'' LONG, OFTEN INFLATED, THE BEAK USUALLY 
AS LONG AS THE BODY OR LONGER (SHORT-BEAKED IN NOS, II-16, 34 AND 35); PISTILLATE SPIKES 
MOSTLY LARGE (SMALL IN NOS. I, 13 AND 14), GLOBOSE, OVOID, OBLONG OR CYLINDRIC. NOS. I-35. 
(a) Perigynia membranous or papery. Nos. 1-31. 
Spike solitary, few-flowered, staminate above; perigynia strongly ee flexed: Saas PAuCcI- 
FLORAE. paucifiora. 
2. Spikes normally several, the staminate uppermost; if solitary, staminate at the: base. (See no. 
30.) Nos. 2-31. 
% Perigynia ovoid, conic with a narrowed base, or subulate, tapering into the beak. Nos. 2-28. 
+ Teeth of the perigynium-beak slender, short or none; not stiff nor awned. Nos, 2-24. 
t Teeth of the perigynium-beak lanceolate or subulate. Nos. 2-10, IUPULINAE. 
Pistillate spikes ovoid or globose, few-many-flowered. 
Perigynia subulate, reflexed when mature. 2. C. Collinstt. 
Perigynia conic or ovoid, not reflexed. 
Plants yellow or yellowish; perigynia little inflated. 
Leaves 1'’~2'' wide; staminate spikes sessile. 3. C. abacta, 
Leaves 2''-6'’ wide; staminate spike mostly stalked. 4. C. folliculata. 
Plants green; ,Perigynia much inflated; staminate spike stalked. 
Leaves 2" '' wide; heads loosely flowered. 5. C. tntumescens. 
Leaves 3''-5'' wide; heads globose, dense. 6. C. Asa-Grayt. 
Pistillate spikes oblong or cylindric, densely many-flowered. 
Pistillate spikes oblong; achene longer than thick. 
Perigynia strongly several-nerved, shining; leaves 1''-2'’ wide. 
Perigynia many-nerved, dull; leaves 2 -5'' wide. 
Pistillate spikes cylindric; achene not longer than thick. 
Perigynia yellowish, tapering into a beak twice as long as the body. 9. C.lupuliformtis. 
Perigynia greenish-brown, abruptly narrowed into a beak 2-3 times as long as the body. 
10. C. grandis. 
7) 
C. Louisianica. 
C. lupulina, 
oon 
