Common Name: SEDGE FAMILY
Habit: Annual, perennial herb, often rhizomed or stoloned, often of wet open places; roots fibrous; monoecious, dioecious, or flowers bisexual. Stem: generally 3-sided, generally solid. Leaf: generally 3-ranked; base sheathing, sheath generally closed, ligule generally 0; blade (0 or) linear, parallel-veined. Inflorescence: spikelets generally arranged in head-, spike-, raceme-, or panicle-like inflorescences; flower generally sessile in axil of flower bract, enclosed in a sac-like structure (perigynium) or generally not. Flower: unisexual or bisexual, small, generally wind-pollinated; perianth 0 or generally bristle like; stamens generally 3, anthers attached at base, 4 chambered; ovary superior, chamber 1, ovule 1, style 2--3(4)-branched. Fruit: achene, 2--3 sided.
Genera In Family: +- 100 genera, 5000 species: especially temperate. Note: Difficult; taxa differ in technical characters of inflorescence, fruit. In Carex and Kobresia, what appear to be individual pistillate flowers in fact are highly reduced inflorescences (whether or not the same applies to staminate flowers is still under debate). In some other works (e.g., FNANM) these are called spikelets, and they are treated as being arranged in spikes. Here and in TJM (1993), what appear to be individual pistillate flowers are called pistillate flowers in Carex (and they are treated as being arranged in spikelets), but spikelets in Kobresia (and they are treated as being arranged into spikes). Though internally inconsistent, the approach here is consistent with traditional usage, and reflects a preference for character states that may be determined in the field. Molecular, morphological, and embryological evidence indicates that Eriophorum crinigerum is to be segregated to a new genus, as Calliscirpus criniger (A. Gray) C.N. Gilmour et al., along with a second, newly described species, Calliscirpus brachythrix C.N. Gilmour et al. (Gilmour et al. 2013); key to genera modified by Peter W. Ball to include Calliscirpus.
eFlora Treatment Author: S. Galen Smith, except as noted
Scientific Editor: S. Galen Smith, Thomas J. Rosatti, Bruce G. Baldwin.

Habit: Annual [perennial herb], 2--30[50] cm, rhizomes 0. Stem: < 0.5[1] mm wide, +- 5-angled, glabrous or scabrous, solid. Leaf: several, basal, spiraled, flower stem with 1+ cauline; sheath margin distally ciliate, with hairs +- 1 mm, soft; ligule 0; blade well developed, < 0.5[1] mm wide, C-shaped in ×-section proximally. Inflorescence: 1, terminal [(> 1, some in leaf axils)], branched, umbel-like [head-like or of 1 spikelet]; inflorescence bracts (1)several, longest < to > inflorescence, leaf-like; spikelets 1--5 [> 5], 2--5 mm, 1--1.5 mm wide, cylindric; flower bracts 6--30[50], 1.5--2 mm, spiraled, each with 1 flower in axil, puberulent, midrib keeled, tip shallow-notched or not, mucronate or not. Flower: bisexual; perianth 0; style [2]3-branched, base enlarged, persistent. Fruit: > 1 mm, wide-obovate, thick-(2)3-sided, wavy-ridged or papillate.
Etymology: (Latin: bulb-like style)
eFlora Treatment Author: S. Galen Smith
Reference: Kral 2002 FNANM 23:131--136
Unabridged Reference: Kral 1971 Sida 4:57--227