Jepson eFlora: Taxon page
Vascular Plants of California
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Kallstroemia grandiflora

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.
Etymology: (Anders Kallstroem, obscure contemporary of Scopoli, author of genus, 1733--1812)
Reference: [Porter 1969 Contr Gray Herb 198:41--153]
Kallstroemia grandiflora A. Gray
Stem: decumbent to ascending, < 1 m; both densely silky and sharply bristly. Leaf: stipules 4--10 mm; leaflets 8--16. Flower: peduncle >> subtending leaf; sepals persistent, >> fruit body, spreading, margins strongly inrolled; petals 15--30 mm, yellow to orange, darker at base. Fruit: 2--3 mm wide, ovoid; style 3 × fruit body.
Ecology: Uncommon. Sandy roadsides; Elevation: 300--900 m. Bioregional Distribution: DSon (near Desert Center, Riverside Co.; Jacumba, San Diego Co.); expected but evidently not yet found elsewhere; Distribution Outside California: native Arizona to Texas, western Mexico. Flowering Time: Sep--Oct
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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Citation for this treatment: Duncan M. Porter 2012, Kallstroemia grandiflora, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 16, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora,, accessed on April 16, 2024.

Kallstroemia grandiflora
click for enlargement
©2013 Keir Morse
Kallstroemia grandiflora
click for enlargement
©2013 Keir Morse
Kallstroemia grandiflora
click for enlargement
©2013 Keir Morse
Kallstroemia grandiflora
click for enlargement
©2013 Keir Morse
Kallstroemia grandiflora
click for enlargement
©2013 Keir Morse

More photos of Kallstroemia grandiflora
in CalPhotos

Geographic subdivisions for Kallstroemia grandiflora:
DSon (near Desert Center, Riverside Co. Jacumba, San Diego Co.) expected but evidently not yet found elsewhere
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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).


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).