Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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Staria S. Vanderpool

Annual, shrub, tree, ill-smelling
Leaves generally 1-palmate, generally alternate, generally petioled; stipules generally minute, often bristle-like or hairy; leaflets 3–7
Inflorescence: raceme, head, or flowers solitary, generally longer 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: generally capsule, septicidal; valves generally 2, deciduous, leaving septum (frame-like placentas) behind; pedicel generally ± reflexed to spreading
Genera in family: 45 genera, 800 species: widespread tropical to arid temp; some cultivated (Capparis spinosa , caper bush)
Reference: [Ernst 1963 J Arnold Arbor 44:81–93]
CA members placed in subfamily Cleomoideae. Alternate family name: Capparidaceae.


Annual, generally glabrous
Stem generally ascending to erect, generally branched from base, often red-tinged
Leaves generally many; petiole generally 7–20 mm; leaflets generally 3
Inflorescence: raceme, ± terminal; flowers solitary in leaf axils, or both; pedicel generally 4–25 mm
Flower radial to bilateral; parts generally yellow; sepals fused in basal third, generally entire; petals ± sessile, upper 2 often recurved
Fruit: capsule, often wider than long; septum elliptic to round; receptacle stalk-like
Seeds < 10
Species in genus: ± 10 species: arid w North America
Etymology: (Diminutive of Cleome)
Reference: [Payson 1922 Univ Wyoming Publ Sci Bot 1:29–46]
C. hillmanii Nelson, known from near Reno, NV; may be found in adjacent CA.


C. plocasperma S. Watson

Plant glabrous
Stem branched generally from upper nodes, 10–55(80) cm, smooth
Leaf: leaflets 15–45 mm, linear-elliptic
Inflorescence: raceme, 1–20 cm, terminal
Flower: sepals 0.9–2.2 mm, lanceolate; petals 3.5–7 mm; stamens 8–12 mm, anthers 1.5–1.9 mm; style 0.8–1.2 mm
Fruit 4–5 mm; valves ± hemispheric to horn-shaped; receptacle 6–10 mm, spreading to ascending
Ecology: Wet, alkaline meadows, greasewood flats, around thermal springs
Elevation: 800–1400 m.
Bioregional distribution: Great Basin Floristic Province, Mojave Desert
Distribution outside California: to Oregon, Idaho, Utah
Flowering time: May–Jul
Varieties mojavensis (Payson) Crum, stricta Crum of uncertain taxonomic status.

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bioregional map for CLEOMELLA%20plocasperma being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Cleomella plocasperma
Retrieve dichotomous key for Cleomella
Overlay Consortium of California Herbaria specimen data by county on this map
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