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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. parviflora Norton
NATIVE
Stem: prostrate to decumbent, < 1 m, strigose to glabrous. Leaf: stipules 5–7 mm; leaflets 6–10. Flower: pedicel > subtending leaf; sepals persistent, ± = to slightly > fruit body, appressed; petals 6–12 mm, orange. Fruit: 4–6 mm wide, ovoid; style to 3 × fruit body.
Uncommon. Sandy roadsides, slopes; 1500–2000 m. c Peninsular Ranges (near Warner Hot Springs, San Diego Co.), e Mojave Desert, expected elsewhere; native Arizona to central United States, central Mexico. Recently collected in San Bernardino Co., near site of 1950 collections. Aug–Oct [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Dec 18 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=29862, accessed on Dec 18 2014

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Geographic subdivisions indicated for the distribution of Kallstroemia parviflora 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.