Jepson eFlora: Taxon page
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Lewisia triphylla

Higher Taxonomy
Family: MontiaceaeView DescriptionDichotomous Key

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 triphylla (S. Watson) B.L. Rob.
Habit: Taproot 0; tuberous root spheric, with many rootlets. Leaf: basal withering before flower, cauline leaves 3--5, whorled, less often 2, opposite, 1--6 cm, linear or thread-like, entire, tapered to base, tip obtuse. Inflorescence: stems 1--several, generally 2--7 cm above ground, each with open, 1--25-flowered cluster; flowers included in or exserted from leaves; bracts among flowers, +- lanceolate, entire; pedicels 5--15(25) mm. Flower: sepals 2, +- 1/2 × corolla, ovate, entire; petals 5--9, 4--7 mm, oblong-oblanceolate, white or +- pink, veins purple, tips rounded; stamens 3--5; stigmas 3--5. Fruit: 3--4 mm. Seed: 8--25, 1 mm.
Ecology: Moist sandy or gravelly slopes, grassy meadows, open conifer forest; Elevation: 1300--3400 m. Bioregional Distribution: KR, NCoRH, CaRH, SN, Wrn; Distribution Outside California: to British Columbia, Rocky Mountains. Flowering Time: May--Aug Note: Hybridizes with Lewisia nevadensis.
Synonyms: Claytonia triphylla S. Watson; Erocallis triphylla (S. Watson) Rydb.; Oreobroma triphyllum (S. Watson) Howell
eFlora Treatment Author: John M. Miller & Lauramay T. Dempster
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Next taxon: Lewisia ×whiteae

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botanical illustration including Lewisia triphylla


Citation for this treatment: John M. Miller & Lauramay T. Dempster 2016. Lewisia triphylla, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 05, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 05, 2016.

Lewisia triphylla
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© 2009 Keir Morse
Lewisia triphylla
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© 2008 Aaron Schusteff
Lewisia triphylla
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© 2007 George W. Hartwell
Lewisia triphylla
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© 2009 George W. Hartwell
Lewisia triphylla
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© 2010 Neal Kramer
Lewisia triphylla
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© 2009 Keir Morse

More photos of Lewisia triphylla in CalPhotos

Geographic subdivisions for Lewisia triphylla:
KR, NCoRH, CaRH, SN, Wrn;
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).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
View all CCH records

CCH collections by month

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