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Lewisia pygmaea
DWARF LEWISIA

Higher Taxonomy
Family: MontiaceaeView DescriptionDichotomous Key

Common Name: MINER'S LETTUCE FAMILY
Habit: Annual to perennial herb; generally fleshy. Stem: 1--many, generally glabrous. Leaf: simple, alternate or opposite. Inflorescence: axillary or terminal; cyme, raceme, panicle, umbel, or flower 1. Flower: bisexual, radial; sepals generally 2(9), free; petals (1)2--19, free or +- fused; stamens 1--many, epipetalous or not, anthers pink, rose, or yellow; ovary superior, chamber 1, ovules 1--many, placenta basal or free-central; styles (0)1--8, generally fused at base, branched. Fruit: capsule, circumscissile or 2--3-valved. Seed: 1--many, shiny or +- pebbly or sculptured, black or gray, generally with oil-filled appendage as food for ants.
Genera In Family: +- 22 genera, +- 230 species: generally temperate America, Asia, Australia, Europe, Kerguelen Is, New Zealand, southern Africa, poorly represented in Europe; some cultivated (Lewisia, Calandrinia). Note: All CA genera previously included in Portulacaceae; details of flowers, seeds require 20× magnification.
Unabridged Note: May include Hectorellaceae.
eFlora Treatment Author: John M. Miller, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: LewisiaView DescriptionDichotomous Key

Habit: Perennial herb generally from short, thick, +- branched taproot; tuberous root generally 0 (or spheric). Stem: prostrate to erect, scape-like or branched. Leaf: generally in basal rosette and cauline, simple, entire or not; base wide; margin generally +- translucent. Inflorescence: +- scapose; cyme, panicle, raceme, or +- umbel; stems 1--many, generally leafless but bracted, disjointing in age or not, 1--many flowered; pedicel 0--30 mm. Flower: sepals 2--8, free, persistent; petals 4--19, white, cream, yellow, orange, pink, rose, purple, overlapped in bud, often with pink or dark purple veins; stamens 1--50; styles 2--8, fused at base, stigmas 2--8, thread-like. Fruit: 6--9 mm, spheric or ovoid, circumscissile near middle or below, translucent. Seed: 1--50, dark, generally shiny, smooth or finely tubercled, 1--4 mm in size.
Species In Genus: 18 species: western North America, 16 in flora. Etymology: (Captain Meriwether Lewis, of Lewis & Clark Expedition, 1774--1809) Note: Many hybrids, cultivated, including Lewisia ×whiteae Purdy in California; Lewisia columbiana (A. Gray) B.L. Rob. not in California.
Unabridged Note: Many hybrids, cultivars (Mathew 1989), including Lewisia ×whiteae Purdy in California, as well as Lewisia columbiana (Howell ex A. Gray) B.L. Rob. from Douglas Co., Oregon north to British Columbia; Lewisia maguirei A.H. Holmgren endemic to Nevada; Lewisia sacajaweana B.L. Wilson & E. Rey-Vizgirdas restricted to Idaho; Lewisia tweedyi, endemic to northern Cascades of Washington, British Columbia now placed in Cistanthe.
eFlora Treatment Author: John M. Miller & Lauramay T. Dempster

Lewisia pygmaea (A. Gray) B.L. Rob.
NATIVE
Leaf: generally several, rosetted, 2--9 cm, thread-like to lance-linear, fleshy, entire, tapered to expanded base, tip blunt. Inflorescence: stems several to many, 1--5 cm, each 1-(several-)flowered, flowers generally included in leaves; bracts 2, at or below stem middle, +- widely lanceolate, entire or dentate, glands 0 or pale; pedicel 2--5(10) mm. Flower: sepals 2, +- 1/2 × corolla, +- ovate, rounded or truncate, margin +- jagged or toothed, glands 0 or pale; petals 5--9, 4--10 mm, obovate, white, pink, or magenta (base green), +- striped, tip +- jagged; stamens 4--8; stigmas 3--6. Fruit: 4--5 mm. Seed: 15--24, 1--2 mm. Chromosomes: n=+-33.
Ecology: Rocky slopes, wet granite sand, gravel, moist meadows, along streams; Elevation: 1700--4020 m. Bioregional Distribution: KR, NCoRH, CaRH, SNH, WTR, SnBr, Wrn, SNE; Distribution Outside California: to Alaska, Rocky Mountains. Flowering Time: May--Aug
Synonyms: Talinum pygmaeum A. Gray; Calandrinia grayi Britton; Lewisia sierrae Ferris; Lewisia exarticulata H. St. John; Lewisia minima (A. Nelson) A. Nelson; Oreobroma aridorum (Bartlett) A. Heller; Oreobroma exarticulatum (H. St. John) Rydb.; Calandrinia pygmaea (A. Gray) A. Gray, illeg.; Lewisia pygmaea (A. Gray) B.L. Rob. var. aridorum Bartlett; Lewisia pygmaea var. sierrae (Ferris) D.W. Taylor
eFlora Treatment Author: John M. Miller & Lauramay T. Dempster
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Citation for this treatment: John M. Miller & Lauramay T. Dempster 2016. Lewisia pygmaea, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=30838, accessed on September 25, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on September 25, 2016.


Lewisia pygmaea
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© 2010 California Academy of Sciences
Lewisia pygmaea
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© 2010 Keir Morse
Lewisia pygmaea
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© 2011 Neal Kramer
Lewisia pygmaea
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© 2015 Barry Breckling
Lewisia pygmaea
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© 2008 Aaron Schusteff
Lewisia pygmaea
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© 2016 California Academy of Sciences

More photos of Lewisia pygmaea in CalPhotos


Geographic subdivisions for Lewisia pygmaea:
KR, NCoRH, CaRH, SNH, WTR, SnBr, Wrn, SNE;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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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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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.