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MONTIACEAE MINER'S LETTUCE FAMILY

John M. Miller, except as noted

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.
± 22 genera, ± 230 species: generally temperate America, Asia, Australia, Europe, Kerguelen Is, New Zealand, southern Africa, poorly represented in Europe; some cultivated (Lewisia, Calandrinia). [Ogburn & Edwards 2009 Amer J Bot 96:391–408] Details of flowers, seeds require 20× magnification. —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Applequist et al. 2006 Syst Bot 31:310–319; Nyffeler et al. 2008 Haseltonia 14: 26–36]
Unabridged note: May include Hectorellaceae.

Key to Montiaceae

CLAYTONIA

John M. Miller & Kenton L. Chambers

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.
27 species: Central America, North America, eastern Asia, Siberia. (John Clayton, colonial American botanist, 1694–1773) [Miller & Chambers 2006 Syst Bot Monogr 78:1–236]
Unabridged references: [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]

Key to Claytonia

C. rubra (Howell) Tidestr.
NATIVE
Annual (perennial herb). Stem: 1–15 cm. Leaf: basal 1–8 cm, blade < 2 cm, elliptic to widely deltate, base truncate to wedge-shaped, tip generally obtuse, petiole linear; cauline fused or ± free on 1 side, < 4 cm wide, generally round or with 2 ± square corners. Inflorescence: ± dense, 1-bracted at base; flowers 3–30. Flower: sepals 1.5–3 mm; petals 2–3.5 mm, white to pink-white. Fruit: 2–3 mm. Seed: 1–2 mm, elliptic, shiny, smooth. Intergrades with Claytonia parviflora, Claytonia perfoliata. [Online Interchange]

Previous taxon: Claytonia perfoliata subsp. perfoliata
Next taxon: Claytonia rubra subsp. depressa

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 28 2014
Citation for this treatment: [Author of taxon treatment] 2013. Claytonia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=19634, accessed on Jul 28 2014

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click for enlargement Claytonia rubra
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© 1995 Saint Mary's College of California

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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.