Jepson Herbarium
The University and Jepson Herbaria
University of California, Berkeley
Jepson eFlora: Taxon page
Vascular Plants of California
Key to families | Table of families and genera
Previous taxon Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Next taxon

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.
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
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

Previous taxon: Scirpus diffusus
Next taxon: Scirpus pendulus

Botanical illustration including Scirpus microcarpusbotanical illustration including Scirpus microcarpus


Please use this Google Form for Contact/Feedback

Citation for this treatment: S. Galen Smith 2012, Scirpus microcarpus, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=43718, accessed on December 02, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on December 02, 2024.

Scirpus microcarpus
click for image enlargement
©2016 Steve Matson
Scirpus microcarpus
click for image enlargement
©2004 Steve Matson
Scirpus microcarpus
click for image enlargement
©2016 Keir Morse
Scirpus microcarpus
click for image enlargement
©2010 Keir Morse
Scirpus microcarpus
click for image enlargement
©2010 Keir Morse

More photos of Scirpus microcarpus
in CalPhotos



Geographic subdivisions for Scirpus microcarpus:
CA
MAP CONTROLS
1. You can change the display of the base map layer control box in the upper right-hand corner.
2. County and Jepson Region polygons can be turned off and on using the check boxes.
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 occurrence).






 

Data provided by the participants of the  Consortium of California Herbaria.

MAP LEGEND
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
READ ABOUT YELLOW FLAGS

CCH collections by month Flowering-Fruiting Monthly Counts

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 (fruiting time in some monocot genera).