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ZYGOPHYLLACEAE CALTROP FAMILY

Duncan M. Porter

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).
27 genera, ± 250 species: widespread especially in warm, dry regions; some cultivated (Guaiacum, lignum vitae; Tribulus, caltrop). [Sheahan & Chase 2000 Syst Bot 25:371–384] —Scientific Editor: Thomas J. Rosatti.

Key to Zygophyllaceae

KALLSTROEMIA
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.
17 species: warm and tropical America. (Anders Kallstroem, obscure contemporary of Scopoli, author of genus, 1733–1812) [Porter 1969 Contr Gray Herb 198:41–153]

Key to Kallstroemia

K. californica (S. Watson) Vail
NATIVE
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.
Flat, sandy or disturbed areas; < 600 m. Desert; to Texas, Mexico. Aug–Oct [Online Interchange]
Unabridged note: "Last collected in California in 1948" (TJM (1993), p. 1099) no longer true.

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 2 2014
Citation for this treatment: [Author of taxon treatment] 2013. Kallstroemia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=29857, accessed on Sep 2 2014

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click for enlargement Kallstroemia californica
See CalPhotos for additional images
2004 James M. Andre

Geographic subdivisions indicated for the distribution of 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.
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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.
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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.