Jepson eFlora: Taxon page
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Kallstroemia californica

Higher Taxonomy
Family: ZygophyllaceaeView DescriptionDichotomous Key

Habit: Annual, perennial herb, shrub, often armed; caudex present or not. Stem: branched; nodes often angled, swollen. Leaf: 1-compound, opposite, petioled; stipules persistent or not; leaflets entire. Inflorescence: flowers 1--2 in axils. Flower: bisexual; sepals 5, free, persistent or not; petals 5, free, generally spreading, twisted (corolla propeller-like) or not; stamens 10, appendaged on inside base or not; ovary superior, chambers (and lobes) 5--10, each with 1--several ovules, placentas axile. Fruit: capsule or splitting into 5--10 nutlets (= mericarps).
Genera In Family: 27 genera, +- 250 species: widespread especially in warm, dry regions; some cultivated (Guaiacum, lignum vitae; Tribulus, caltrop).
eFlora Treatment Author: Duncan M. Porter
Scientific Editor: Thomas J. Rosatti.
Genus: KallstroemiaView DescriptionDichotomous Key

Habit: Annual, unarmed. Stem: spreading radially, prostrate to ascending, < 1 m. Leaf: even-1-pinnate; stipules narrow, green. Inflorescence: flowers 1 in axils. Flower: sepals persistent or not; petals yellow to orange, persistent, withering. Fruit: 10-lobed, splitting into 10 tubercled nutlets; style persistent; pedicel reflexed. Seed: 1 per chamber.
Species In Genus: 17 species: warm and tropical America. Etymology: (Anders Kallstroem, obscure contemporary of Scopoli, author of genus, 1733--1812)

Kallstroemia californica (S. Watson) Vail
Stem: prostrate to decumbent, < 0.7 m, strigose to glabrous. Leaf: stipules 1.5--5 mm; leaflets 6--12. Flower: pedicel generally < to +- = subtending leaf; sepals spreading, deciduous; petals 3--5 mm, yellow. Fruit: 3--5 mm wide, ovoid; style < body.
Ecology: Flat, sandy or disturbed areas; Elevation: < 600 m. Bioregional Distribution: D; Distribution Outside California: to Texas, Mexico. Flowering Time: Aug--Oct
Unabridged Note: "Last collected in California in 1948" (TJM (1993), p. 1099) no longer true.
eFlora Treatment Author: Duncan M. Porter
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botanical illustration including Kallstroemia californica


Citation for this treatment: Duncan M. Porter 2016. Kallstroemia californica, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on February 06, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on February 06, 2016.

Kallstroemia californica
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© 2014 Keir Morse
Kallstroemia californica
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© 2012 Keir Morse
Kallstroemia californica
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© 2012 Keir Morse
Kallstroemia californica
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© 2011 Neal Kramer
Kallstroemia californica
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© 2012 Keir Morse
Kallstroemia californica
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© 2013 Neal Kramer

More photos of Kallstroemia californica in CalPhotos

Geographic subdivisions for Kallstroemia californica:
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.