Jepson Herbarium
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Claytonia perfoliata subsp. mexicana


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: 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 perfoliataView Description 


Common Name: ROOREH
Habit: Annual. Stem: 1--40 cm, spreading to erect. Leaf: basal 1--25 cm, blade < 4 cm, < 3 × longer than wide, elliptic to reniform, tip rounded to acute, petiole linear; cauline fused into < 10 cm diam, round, +- obtuse-angled, or +- square disk (or free on 1 side). Inflorescence: stalked or not, open or dense, 1-bracted at base; flowers 5--40. Flower: sepals 1.5--5 mm; petals 2--6 mm, white or +- pink. Fruit: 1.5--4 mm. Seed: 1.2--2.7 mm, ovate to round, shiny, smooth.
Note: Highly variable; subspecies difficult because of environmental modification of character states, genetic mixing among polyploids, and geographic overlap of distinct, self-pollinated forms.
Claytonia perfoliata Willd. subsp. mexicana (Rydb.) John M. Mill. & K.L. Chambers
NATIVE
Leaf: basal deltate to reniform, mucronate; cauline disk angles generally 2, generally short-pointed. Chromosomes: 2n=12,24.
Ecology: Shrubland, woodland, rock crevices, rockslides; Elevation: 500--2000 m. Bioregional Distribution: NCoR, SnFrB, SCoR, TR, PR; Distribution Outside California: Arizona, Mexico, Central America. Flowering Time: Feb--Apr Note: Intergrades with Claytonia perfoliata subsp. perfoliata, Claytonia parviflora, Claytonia rubra.
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 perfoliata subsp. mexicanabotanical illustration including Claytonia perfoliata subsp. mexicana


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Citation for this treatment: John M. Miller & Kenton L. Chambers 2012, Claytonia perfoliata subsp. mexicana, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=76956, accessed on December 03, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on December 03, 2024.

Claytonia perfoliata subsp. mexicana
click for image enlargement
©2019 Neal Kramer
Claytonia perfoliata subsp. mexicana
click for image enlargement
©2019 Neal Kramer

More photos of Claytonia perfoliata subsp. mexicana
in CalPhotos



Geographic subdivisions for Claytonia perfoliata subsp. mexicana:
NCoR, SnFrB, SCoR, TR, PR
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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 occurrence).






 

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

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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.
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CCH collections by month Flowering-Fruiting Monthly Counts

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).