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Indexes to all accepted names and synonyms:
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Annual, perennial herb, often rhizomed or stoloned, often of wet open places; roots fibrous; generally 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: 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-branched. Fruit: achene, 2–3 sided.
± 100 genera, 5000 species: especially temperate. [Ball et al. 2002 FNANM 23:1–608] Difficult; taxa differ in technical characters of inflorescence, fruit. In Carex and Kobresia, what appear to be 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 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. —Scientific Editors: S. Galen Smith, Thomas J. Rosatti, Bruce G. Baldwin.
Unabridged references: [Tucker 1987 J Arnold Arbor 68:361–445; Bruhl 1995 Australian Syst Bot 8:125–305]
Key to Cyperaceae
Annual, perennial herb, cespitose, rhizomed or not. Stem: simple, cylindric, <= 0.5 mm diam, not hollow. Leaf: basal, spiraled, 1–few; blade vestigial to >> sheath, <= 1 mm wide; ligule 0. Inflorescence: terminal, head-like, inflorescence bracts 1–2, 2–33 mm, leaf-like; spikelets 1–3(15), ± ovate, ± flat or not, many-flowered, 1–10 mm, 1–2 mm wide; flower bracts spiraled, each with 1 flower in axil, ovate, membranous, tip entire, generally short-awned. Flower: bisexual; perianth 0; stamens 1–3, anthers >= 0.6 mm; style 1, thread-like, base ± enlarged or not, stigmas 2–3. Fruit: ± wide-obovate, generally ± white to dark brown, minute-papillate, prominent-ridged lengthwise, or smooth, mucronate; tubercle 0.Key to Isolepis
69 species: temperate, subtropics, ± worldwide, especially Africa, Australia. (Greek: equal flower bract) [Muasya et al. 2007 Novon 17:59]
Unabridged etymology: (Greek, isos, equal, similar, and lepis a flower bract)
Unabridged references: [Muasya et al. 2006 Novon 16:19–20; Smith 2002 FNANM 23:137–140; Musaya & Simpson 2002 Kew Bull 57:257–362.]
(Annual?) perennial herb 3–25 cm, rhizomed. Leaf: 2. Inflorescence: inflorescence bracts 1–2, lowest 3–10(20) mm; flower bracts not clasping shed fruit, 1.2–1.6 mm, awn <= 0.1 mm. Flower: stigmas 2–3. Fruit: 0.8–1 mm, 0.5–0.6 mm wide, 2–3-sided, shallower than wide, ribbed lengthwise, not papillate.
2n=30. Stream, pond shores, generally coastal; < 1500 m. North Coast, n Sierra Nevada; to British Columbia; Eurasia, Africa, Australia, New Zealand. [Scirpus setaceus L.] Late spring–fall [Online Interchange]
Previous taxon: Isolepis levynsiana
Next taxon: Kobresia
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 25 2014
Citation for this treatment: [Author of taxon treatment] 2013. Isolepis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=29420, accessed on Jul 25 2014
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