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Calyptridium monandrum

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: CalyptridiumView DescriptionDichotomous Key

Common Name: PUSSYPAWS
Habit: Annual, perennial herb, +- fleshy, from taproot or fibrous roots, glabrous. Stem: 1--several, generally spreading to ascending. Leaf: basal or basal and cauline, simple, oblanceolate to spoon-shaped; basal rosetted. Inflorescence: raceme, panicle, or umbel, scapose, bracts generally < sepals, leaf-like or not; flowers generally on 1 side of axis, persistent in fruit or not; pedicels appearing jointed at base with a transverse groove or constriction or not. Flower: sepals 2, ovate to reniform, generally scarious or scarious-margined, persistent in fruit; petals 2--4, < sepals, tips adherent, forming cap in fruit (fruit cap), falling as 1 unit; stamens 1--3, anthers pink, rose, or yellow; style included to exserted, stigmas 2. Fruit: 2-valved, generally compressed, narrowly oblong to +- round, generally translucent, deciduous or not. Seed: 1--many, black, dull, with fine to coarse papillae, to shiny, with papillae 0.
Species In Genus: 9 species: western North America. Etymology: (Greek: cap, for petal tips in fruit) Note: Calyptridium parryi var. arizonicum raised to species rank, as Calyptridium arizonicum, by Simpson et al. (2010) based on morphological and geographic distinctions.
eFlora Treatment Author: C. Matt Guilliams & John M. Miller

Calyptridium monandrum Nutt.
Habit: Annual 1.5--18 cm; taproot slender. Stem: spreading to decumbent, leafy. Leaf: basal 1--5 cm, narrow-oblanceolate to -spoon-shaped, withering in fruit; cauline 1--2(4) cm. Inflorescence: axillary, raceme or panicle, 1--4 cm, generally open; bracts narrowly ovate; flowers +- sessile, generally persistent in fruit. Flower: sepals 1--2 mm, ovate to deltate, fleshy, narrowly white on margin in flower, scarious throughout in fruit; petals generally 3, 1--3 mm, pink to +- red; stamen 1; stigma sessile. Fruit: 3--6 mm, oblong to linear, in width generally +- > seed. Seed: 4--10, 0.5--0.8 mm. Chromosomes: 2n=44.
Ecology: Widespread in desert and scrub, open areas, sandy soils, burns; Elevation: generally < 2000 m. Bioregional Distribution: s SN, Teh, SnJV, CW, SW, SNE, D; Distribution Outside California: Nevada, Arizona, northwestern Mexico. Flowering Time: Jan--Jul
Synonyms: Cistanthe monandra (Nutt.) Hershk.
eFlora Treatment Author: C. Matt Guilliams & John M. Miller
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botanical illustration including Calyptridium monandrum


Citation for this treatment: C. Matt Guilliams & John M. Miller 2016. Calyptridium monandrum, Revision 2, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 04, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 04, 2016.

Calyptridium monandrum
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© 2009 Keir Morse
Calyptridium monandrum
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© 2010 Neal Kramer
Calyptridium monandrum
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© 2014 Keir Morse
Calyptridium monandrum
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© 2011 Michael G. Simpson
Calyptridium monandrum
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© 2009 Keir Morse
Calyptridium monandrum
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© 2006 Steve Matson

More photos of Calyptridium monandrum in CalPhotos

Geographic subdivisions for Calyptridium monandrum:
s SN, Teh, SnJV, CW, SW, SNE, D;
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).

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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.