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Vascular Plants of California
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Claytonia exigua subsp. exigua

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: ClaytoniaView DescriptionDichotomous Key

Habit: Annual, perennial herb, from stolon, rhizome, tuberous root, or taproot, glabrous, +- fleshy. Leaf: entire; basal generally 0--many, rosetted; cauline generally 2, +- opposite, free, +- fused on 1 side, or fused into +- disk. Inflorescence: terminal, raceme, 1-sided; pedicel reflexed, in fruit erect. Flower: petals 5, pink or white; stamens 5; ovary chamber 1, placentas basal, style 1, stigmas 3. Fruit: valves 3, margins inrolling, forcibly expelling seeds. Seed: 3--6, generally black, generally appendaged.
Etymology: (John Clayton, colonial American botanist, 1694--1773)
eFlora Treatment Author: John M. Miller & Kenton L. Chambers
Reference: Miller & Chambers 2006 Syst Bot Monogr 78:1--236
Unabridged Reference: Miller 2003 FNANM 4:465--474; Miller & Chambers 1993 Novon 3:268--273; Miller & Chambers 2006 Systematics of Claytonia Syst Bot Monogr 78:1--236
Species: Claytonia exiguaView Description 

Habit: Annual, +- glaucous. Stem: 1--15 cm, spreading or erect. Leaf: basal < 12 cm, +- linear; cauline < 8 cm. Inflorescence: sessile to long-stalked; flowers 3--15, lowest bracted. Flower: sepals 1.5--3 mm; petals 2--5 mm, white or +- pink; anthers maturing +- with stigmas. Fruit: 1.5--2.5 mm. Seed: 1--1.5 mm, elliptic, dull; appendage minute.
Note: Self-pollinated.
Claytonia exigua Torr. & A. Gray subsp. exigua
Leaf: cauline linear and free or crescent-shaped and +- fused on 1 side. Flower: petals 2--5 mm, white or +- pink. Chromosomes: 2n=16,32,48.
Ecology: Dry or moist, disturbed bare clay to sandy soils, often serpentine; Elevation: < 1000 m. Bioregional Distribution: NW, SNF, GV, CW, TR, PR; Distribution Outside California: to British Columbia. Flowering Time: Apr--Jul
Synonyms: Montia rosulata Eastw.; Montia spathulata (Douglas ex Hooker) Howell, inval.; Montia spathulata var. exigua (Torr. & A. Gray) B.L. Rob.; Montia spathulata var. rosulata (Eastw.) J.T. Howell; Montia spathulata Hook. var. spathulata
Jepson eFlora Author: John M. Miller & Kenton L. Chambers
Reference: Miller & Chambers 2006 Syst Bot Monogr 78:1--236
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Botanical illustration including Claytonia exigua subsp. exigua

botanical illustration including Claytonia exigua subsp. exigua

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Citation for this treatment: John M. Miller & Kenton L. Chambers 2012, Claytonia exigua subsp. exigua, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 24, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora,, accessed on April 24, 2024.

Claytonia exigua subsp. exigua
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©2011 Vernon Smith
Claytonia exigua subsp. exigua
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©2017 Steve Matson
Claytonia exigua subsp. exigua
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©2010 Dana York
Claytonia exigua subsp. exigua
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©2017 Neal Kramer
Claytonia exigua subsp. exigua
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©2021 Neal Kramer

More photos of Claytonia exigua subsp. exigua
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Geographic subdivisions for Claytonia exigua subsp. exigua:
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 occurence).


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

CCH collections by month

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).