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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ONAGRACEAE

EVENING PRIMROSE FAMILY

Warren L. Wagner, except as specified Peter H. Raven, Family Coordinator

Annual to tree
Leaves basal or cauline, alternate, opposite, or whorled, generally simple and toothed (to pinnately compound); stipules 0 or generally deciduous
Inflorescence: spike, raceme, panicle, or flowers solitary in axils; bracted
Flower generally bisexual, generally radial, opening at dawn or dusk; hypanthium sometimes prolonged beyond ovary (measured from ovary tip to sepal base); sepals generally 4(2–7); petals generally 4 (or as many as sepals, rarely 0), often "fading" darker; stamens generally 4 or 8(2), anthers 2-chambered, opening lengthwise, pollen generally interconnected by threads; ovary inferior, chambers generally 4 (sometimes becoming 1), placentas axile or parietal, ovules 1–many per chamber, style 1, stigma 4-lobed (or lobes as many as sepals), club-shaped, or hemispheric
Fruit: capsule, loculicidal (sometimes berry or indehiscent and nut-like)
Seeds sometimes winged or hair-tufted
Genera in family: 15 genera, ± 650 species: worldwide, especially w North America; many cultivated (Clarkia, Epilobium, Fuchsia, Gaura, Oenothera )
Reference: [Munz 1965 North America Fl II 5:1–278]

CAMISSONIA

SUN CUP

Annual, perennial herb, from taproot or lateral roots
Leaves basal, cauline, or both, alternate, simple to 2-pinnate
Inflorescence bracted; spike, raceme, or flowers solitary in axils
Flower radial, generally opening at dawn (rarely at dusk); sepals 4, reflexed (sometimes 2–3 remaining adherent); petals 4, yellow, white, lavender, often with darker basal spots, generally fading purplish or reddish; stamens (4)8, longer ones opposite sepals, anthers generally attached at middle (or base), pollen grains 3-angled except in polyploid taxa (visible with hand lens); ovary chambers 4, stigma ± head-like or hemispheric, generally > anthers and cross-pollinated (or ± = anthers and self-pollinated)
Fruit straight to coiled, generally sessile
Seeds in 1–2 rows per chamber
Species in genus: 62 species: w North America (especially CA-FP), 1 South America
Etymology: (L.A. von Chamisso, French-born German botanist, 1781–1838)
Reference: [Raven 1969 Contr US Natl Herb 37:161–396]
Polyploidy and self-pollination have predominated in evolution of genus. Previously included in Oenothera (" O." in synonyms).

Native

C. boothii (Douglas) P.H. Raven

Annual, generally reddish; rosette generally ± 0 (to well developed); hairs minutely strigose and spreading (some glandular, especially in inflorescence)
Stem erect, 3–65 cm, peeling
Leaves 20–100(130) mm, lanceolate to narrowly elliptic or narrowly ovate, sparsely minutely dentate or serrate; lower oblanceolate or not
Inflorescence nodding; flowers generally 0 at lower nodes
Flower opening at dusk; hypanthium 4–8 mm; sepals (2.7)4–8 mm; petals 3–7.5 mm, generally white (red) fading reddish
Fruit 8–35 mm, 1–3.8 mm wide, cylindric except base wider than tip, ± curved outward to very wavy and twisted, persistent, tardily dehiscent
Seeds in 1 row per chamber, 1.4–2.1 mm, generally of 2 kinds (minutely pitted in rows and pale brown; coarsely papillate and dark brown)
Chromosomes: 2n=14
Ecology: Shrubby or open, dry areas, generally desert
Elevation: < 2400 m.
Bioregional distribution: s Sierra Nevada, Tehachapi Mountain Area, s San Joaquin Valley, San Francisco Bay Area, Inner South Coast Ranges, Western Transverse Ranges, Great Basin Floristic Province, Desert
Distribution outside California: to Washington, Idaho, Utah, Arizona, nw Mexico
Synonyms: O. b. Douglas
Cross-pollinated.

Native

subsp. decorticans (Hook. & Arn.) P.H. Raven

SHREDDING EVENING PRIMROSE

Plant stout, subglabrous except inflorescence; rosette well developed
Stem 12–65 cm
Leaf generally 20–80 mm, generally lanceolate (or lower narrowly ovate), entire to minutely dentate
Inflorescence: bracts inconspicuous
Fruit 1.7–2.3 mm wide, curved outward
Ecology: Open, generally steep and rocky (especially shale) slopes
Elevation: 0–1850 m.
Bioregional distribution: s Sierra Nevada Foothills, Tehachapi Mountain Area, s San Joaquin Valley, San Francisco Bay Area, Inner South Coast Ranges, Western Transverse Ranges
Synonyms: O. b. subspp. d. (Hook. & Arn.) Munz and rutila (Davidson) Munz
Intergrades with subsp. desertorum.

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bioregional map for CAMISSONIA%20boothii%20subsp.%20decorticans 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 Camissonia boothii subsp. decorticans
Retrieve dichotomous key for Camissonia
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
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