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Vascular Plants of California
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Scirpus microcarpus


Higher Taxonomy
Family: CyperaceaeView DescriptionDichotomous Key
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.
Genus: ScirpusView DescriptionDichotomous Key


Common Name: BULRUSH
Habit: Perennial herb, rhizomed [not], glabrous; roots fibrous. Stem: generally erect, 3-angled or cylindric, solid. Leaf: basal and cauline, 3-ranked; blades 4--11 per stem, linear, generally > sheaths, flat [V-shaped in ×-section], margins, generally midribs scabrous; sheaths not fibrous; ligule present or 0. Inflorescence: terminal or in axils of 1--3 distal leaves, spikelets 1 or few to many in panicle or head-like clusters; inflorescence bracts generally 3, leaf-like; spikelets < 5 mm diam; flower bracts 10--50, spiraled, 1--3.5 mm, sharp-pointed, each with 1 flower in axil. Flower: bisexual; perianth of (0)3--6 bristles, < or >> fruit, straight or strong-curled, smooth to barbed or toothed, generally persistent on fruit; stamens 1--3; style 2--3-branched, base persistent. Fruit: 0.5--1.8 mm, ovate, obovate, or elliptic, 2--3-sided, minute-papillate or -pitted.
Species In Genus: +- 35 species: North America, Mexico, Eurasia, Australia. Note: Other taxa in TJM (1993) moved to Amphiscirpus, Bolboschoenus, Isolepis, Schoenoplectus, Trichophorum.
eFlora Treatment Author: S. Galen Smith
Reference: Whittemore & Schuyler 2002 FNANM 23:8--21
Unabridged Reference: Schuyler 1967 Proc Acad Nat Sci Philadelphia 119:295--323; Browning et al. 1995 Brittonia 47:433--445; Smith 1995 Novon 5:97--102
Scirpus microcarpus J. Presl & C. Presl
NATIVE
Habit: Spreading, 60--200 cm; rhizome long. Stem: 2--5 mm diam at middle, 3-angled. Leaf: blade 5--15(20) mm wide; ligule present. Inflorescence: spikelets in head-like clusters, 2--8 mm, 1--3.5 mm wide; flower bract 1--3.5 mm, green or +- black, midrib generally prominent-green. Flower: perianth bristles < to +- > fruit, straight to curved, stout, teeth fine, reflexed. Fruit: +- 0.5--1.5 mm, generally 2-angled. Chromosomes: 2n=64,66.
Ecology: Marshes, wet meadows, streambanks, pond margins, sometimes weedy; Elevation: < 3000 m. Bioregional Distribution: CA; Distribution Outside California: to Alaska, eastern North America, eastern Asia. Flowering Time: Jun--Jul
Synonyms: Scirpus microcarpus var. rubrotinctus (Fernald) M.E. Jones; Scirpus rubrotinctus Fernald
Jepson eFlora Author: S. Galen Smith
Reference: Whittemore & Schuyler 2002 FNANM 23:8--21
Unabridged Reference: Schuyler 1967 Proc Acad Nat Sci Philadelphia 119:295--323; Browning et al. 1995 Brittonia 47:433--445; Smith 1995 Novon 5:97--102
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Citation for this treatment: S. Galen Smith 2012, Scirpus microcarpus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=43718, accessed on July 20, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on July 20, 2019.

Scirpus microcarpus
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© 2003 Keir Morse
Scirpus microcarpus
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© 2008 Steve Matson
Scirpus microcarpus
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© 2014 Neal Kramer
Scirpus microcarpus
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© 2016 Steve Matson
Scirpus microcarpus
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© 2003 Steve Matson
Scirpus microcarpus
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© 2014 Neal Kramer

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Geographic subdivisions for Scirpus microcarpus:
CA
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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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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.