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Previous taxon Indexes to all accepted names and synonyms:
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S. Galen Smith, except as noted

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-branched. Fruit: achene, 2–3 sided.
± 100 genera, 5000 species: especially temperate. [Gilmour et al. 2013 Kew Bull 68:85–105] 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. —Scientific Editors: S. Galen Smith, Thomas J. Rosatti, Bruce G. Baldwin.
Unabridged references: [Ball et al. 2002 FNANM 23:1–608; Bruhl 1995 Australian Syst Bot 8:125–305; Tucker 1987 J Arnold Arbor 68:361–445;]

Key to Cyperaceae

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.
± 100 species: worldwide. (Latin: bulb-like style) [Kral 2002 FNANM 23:131–136]
Unabridged references: [Kral 1971 Sida 4:57–227]

B. capillaris (L.) C.B. Clarke THREAD-LEAVED BEAKSEED
Stem: generally > leaves. Leaf: blade < 0.5 mm wide. Inflorescence: spikelets 1–7, 2–5 mm, 1–1.5 mm wide; flower bracts ovate. Fruit: 0.5–0.7 mm, pale brown, transverse-wavy-ridged, angles sharp, tubercle ± round.
2n=84. Open damp/dry sandy-gravelly soil; 300–2200 m. High Cascade Range, n Sierra Nevada Foothills, High Sierra Nevada; to eastern North America, Caribbean, Central America, South America, Asia, Pacific Islands. Superficially resembles Fimbristylis autumnalis (L.) Roem. & Schult., which has leaf blades wider and generally proximally flat, sheath summit with short (<< 0.5 mm) hairs on margin and across sheath (resembling a ligule), and flower bracts glabrous. Jun–Jul [Online Interchange] {CNPS list}

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Mar 30 2015
Citation for this treatment: [Author of taxon treatment] 2013. Bulbostylis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Mar 30 2015

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Geographic subdivisions indicated for the distribution of Bulbostylis capillaris Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.