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CLEOMACEAE SPIDERFLOWER FAMILY

Robert E. Preston & Staria S. Vanderpool

Annual, perennial herb, shrub, often ill-smelling. Leaf: generally 1-palmate, generally alternate, generally petioled; stipules generally minute, often bristle-like or hairy; leaflets 0 or 3–7. Inflorescence: raceme, head, or flowers 1, expanded in fruit; bracts generally 3-parted below, simple above, or 0. Flower: generally bisexual, radial to ± bilateral; sepals generally 4, free or fused, generally persistent; petals generally 4, free, ± clawed; stamens generally 6, free, exserted, anthers generally coiling at dehiscence; ovary superior, generally on stalk-like receptacle, chamber generally 1, placentas generally 2, parietal, style 1, persistent, stigma generally minute, ± head-like. Fruit: 2 nutlets or generally capsule, septicidal; valves generally 2, deciduous, leaving septum (frame-like placentas) behind; pedicel generally ± reflexed to spreading.
17 genera, ± 150 species: widespread tropics to arid temperate. [Iltis & Cochrane 2007 Novon 17:447–451] Treated as Capparaceae in TJM (1993). —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Ernst 1963 J Arnold Arbor 44:81–93]

Key to Cleomaceae

CLEOMELLA
Annual, generally glabrous. Stem: generally ascending to erect, sometimes prostrate when older, generally branched from base, often red-tinged. Leaf: generally many; petiole generally 7–20 mm; leaflets generally 3. Inflorescence: raceme, ± terminal, flowers 1 in leaf axils, or both; pedicel generally 4–25 mm. Flower: parts generally yellow; sepals fused in basal 1/3, generally entire; petals ± sessile, upper 2 often recurved. Fruit: 2–6 mm, often wider than long; septum elliptic to round; receptacle stalk-like. Seed: < 10.
± 10 species: arid western North America. (Diminutive of Cleome) [Holmgren 2004 Brittonia 56:103–106]

Key to Cleomella

Previous taxon: Carsonia sparsifolia
Next taxon: Cleomella brevipes

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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. Cleomella, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=10309, accessed on Dec 18 2014

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