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Vascular Plants of California
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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)
Reference: [Porter 1969 Contr Gray Herb 198:41--153]
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.
Jepson eFlora Author: Duncan M. Porter
Reference: [Porter 1969 Contr Gray Herb 198:41--153]
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Botanical illustration including Kallstroemia californica

botanical illustration including Kallstroemia californica


Citation for this treatment: Duncan M. Porter 2012, Kallstroemia californica, in Jepson Flora Project (eds.) Jepson eFlora, /eflora/eflora_display.php?tid=29857, accessed on March 09, 2021.

Citation for the whole project: Jepson Flora Project (eds.) 2021, Jepson eFlora,, accessed on March 09, 2021.

Kallstroemia californica
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© 2012 Keir Morse
Kallstroemia californica
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© 2011 Neal Kramer
Kallstroemia californica
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© 2004 James M. Andre
Kallstroemia californica
click for enlargement
© 2011 Neal Kramer
Kallstroemia californica
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© 2013 Neal Kramer
Kallstroemia californica
click for enlargement
© 2012 Keir Morse

More photos of Kallstroemia californica in CalPhotos

Geographic subdivisions for Kallstroemia californica:
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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 occurence).


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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).