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CROSSOSOMATACEAE CROSSOSOMA FAMILY

Robert E. Preston & James R. Shevock

Shrub, small tree. Stem: generally glabrous; branchlets or twigs generally thorny. Leaf: generally deciduous, simple, generally small, generally alternate, entire; stipules minute or 0. Inflorescence: flowers 1. Flower: generally bisexual, radial; hypanthium short; sepals, petals generally 5(3–6), free; petals generally white, ephemeral; stamens 4–50, on or around disk; pistils 1–9, simple, styles short, stigmas head-like, ovules generally 2–many. Fruit: follicles, 1–9. Seed: brown to black, arilled.
4 genera, 9 species: western United States, Mexico. [Sosa & Chase 2003 Syst Bot 28:96–105] —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Thorne & Scogin 1978 Aliso 9:171–178; Sosa & Chase 2003 Syst Bot 28:96–105]

Key to Crossosomataceae

CROSSOSOMA
Leaf: deciduous (or dry when dormant); petiole 0–short. Inflorescence: peduncle bracted or not. Flower: petals 9–15 mm, ± round or oblong, generally white. Fruit: cylindric, surface smooth or net-like, beak 1–2 mm. Seed: generally > 2 per fruit, black, shiny, round to flat; aril conspicuous, fringed, ± yellow.
2 species: southern California to Arizona, Mexico. (Greek: fringe body, from aril)

Key to Crossosoma

C. bigelovii S. Watson
NATIVE
Plant 1–2 m. Stem: branchlets thorny. Leaf: elliptic to obovate or spoon-shaped. Flower: sepals ± round; petals 9–12 mm, oblong, white to ± purple, clawed. Fruit: 1–3, 8–10 mm, ± straight. Seed: generally 2–5, ± 2 mm diam.
Dry, rocky slopes, canyons; 150–1280 m. eastern San Bernardino Mountains, eastern Peninsular Ranges, Desert; Nevada, Arizona, Baja California. Feb–Apr [Online Interchange]

Previous taxon: Crossosoma
Next taxon: Crossosoma californicum

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Oct 21 2014
Citation for this treatment: [Author of taxon treatment] 2013. Crossosoma, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=21073, accessed on Oct 21 2014

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click for enlargement Crossosoma bigelovii
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2001 CDFA

Geographic subdivisions indicated for the distribution of Crossosoma bigelovii 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.