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

Leaf: many, dense-rosetted, 2--10 cm, narrowly oblanceolate, flat or abaxially grooved, fleshy, entire, tapered to base, tip blunt. Inflorescence: stems several, 12--30 cm, each with open, many-flowered panicle; flowers exserted from leaves; bracts among flowers, few below, gland-toothed; pedicel 5--13 mm. Flower: sepals 2, +- 1/4 × corolla, +- round, gland-toothed; petals 4--11, 5--13 mm, ovate, rose, pink, or white with magenta veins, tip notched; stamens 5--6; stigmas 2--3. Fruit: 3--6 mm. Seed: 1--7, 1.5--2 mm. Chromosomes: n=15.
Note: Hybrid of Lewisia cotyledon, Lewisia leeana.

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
Jepson Online Interchange

Previous taxon: Lewisia stebbinsii
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botanical illustration including Lewisia triphylla


Citation for this treatment: John M. Miller Lewisia triphylla, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on November 22, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017, Jepson eFlora,, accessed on November 22, 2017.

Lewisia triphylla
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© 2005 Steve Matson
Lewisia triphylla
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© 2010 Keir Morse
Lewisia triphylla
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© 2010 Neal Kramer
Lewisia triphylla
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© 2008 Aaron Schusteff
Lewisia triphylla
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© 2011 Steve Matson
Lewisia triphylla
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© 2007 George W. Hartwell

More photos of Lewisia triphylla in CalPhotos

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