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Eleocharis parishii

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-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: EleocharisView DescriptionDichotomous Key

Common Name: SPIKERUSH
Habit: Annual, perennial herb, generally forming mats, glabrous, internal air cavities evident; caudex generally 0; rhizomes generally evident, long, scaly, bulb or tuber at tip generally 0. Stem: simple, generally erect, smooth, generally not hollow; tip generally not rooting. Leaf: 2, basal, blades 0 or tooth-like, <= 1 mm. Inflorescence: inflorescence bracts 0; spikelet terminal, 1, generally ovate, not +- flat [(+- flat)], generally not forming plantlets, flowers 3--100+; flower bracts spiraled [(2-ranked)], each with 1 flower in axil, generally ovate, generally brown, generally membranous, smooth, tip generally acute to obtuse, notch 0; basal flower bract generally encircling stem, generally < 1/2 spikelet, flower generally 0. Flower: bisexual; perianth parts reduced to bristles, 0--8, generally +- <= fruit, barbs generally recurved; stamens generally 3; style 1, thread-like, base enlarged, generally persistent on fruit as tubercle. Fruit: generally obovate, generally brown; tubercle (0 or) generally distinct, generally pyramidal.
Species In Genus: +- 200 species: tropics to boreal. Etymology: (Greek heleios, dwelling in a marsh, and Charis, grace) Note: Eleocharis lanceolata Fernald, Eleocharis equisetoides Torr. not in California.

Eleocharis parishii Britton
NATIVE
Habit: Perennial herb 10--50 cm; rhizome 0.7--2 mm diam, tough. Stem: 0.2--1 mm diam, +- cylindric or +- flat. Leaf: distal sheath firm, persistent, tip subtruncate to subacute, some or all with tooth to 1 mm. Inflorescence: spikelet 3--20 mm, 1.5--2.5 mm wide, narrow-lanceolate or cylindric; flower bracts 15--40, 2--3 mm, tips rounded to acute, not transversely wrinkled, not recurved. Flower: anthers 1--2 mm; stigmas 3. Fruit: 0.8--1.4 mm, 0.5--0.7 mm wide, 3-sided, smooth or minute-net-like; perianth bristles 3--7, vestigial to +- exceeding tubercle. Chromosomes: 2n=10.
Ecology: Locally common. Fresh streams, vernal pools, foothill and riparian woodland, pine forest; Elevation: 500--2300 m. Bioregional Distribution: KR, NCoRI, CaRF, n SN, c SNH, s SNF, GV, SnFrB, SCoRO, SCo, WTR, SnGb, PR, GB, DMoj, w DSon; Distribution Outside California: to Oregon, Kansas, Texas; Mexico. Flowering Time: Late spring--fall Note: Some plants resemble Eleocharis montevidensis.
Synonyms: Eleocharis disciformis Parish; Eleocharis montevidensis Kunth var. parishii (Britton) V.E. Grant
eFlora Treatment Author: S. Galen Smith
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Citation for this treatment: S. Galen Smith 2016. Eleocharis parishii, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=23997, accessed on May 04, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 04, 2016.


Eleocharis parishii
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© 2004 Steve Matson
Eleocharis parishii
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© 2004 Steve Matson
Eleocharis parishii
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© 2010 James M. Andre
Eleocharis parishii
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© 2008 Keir Morse
Eleocharis parishii
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© 2004 Steve Matson
Eleocharis parishii
click for enlargement
© 2010 James M. Andre

More photos of Eleocharis parishii in CalPhotos


Geographic subdivisions for Eleocharis parishii:
KR, NCoRI, CaRF, n SN, c SNH, s SNF, GV, SnFrB, SCoRO, SCo, WTR, SnGb, PR, GB, DMoj, w DSon;
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.
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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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Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.