Jepson Flora Project: Jepson Interchange    

 
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©Copyright 1993 by the Regents of the University of California

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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

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. boothii

BOOTH'S EVENING PRIMROSE

Plant: hairs spreading and glandular
Stem generally 15–40 cm
Leaf 30–80 mm, lanceolate to narrowly ovate, serrate
Inflorescence: bracts leaf-like
Fruit 1.4–2 mm wide, generally very wavy and twisted
Ecology: UNCOMMON. Sandy flats, steep loose slopes, Joshua-tree and pinyon/juniper woodlands
Elevation: 900–2400 m.
Bioregional distribution: East of Sierra Nevada
Distribution outside California: to Washington, nw Arizona
Flowering time: Jun–Aug
Intergrades widely with subspp. alyssoides, intermedia in NV.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for CAMISSONIA%20boothii%20subsp.%20boothii being generated
 


Retrieve Jepson Interchange Index to Plant Names entry for Camissonia boothii subsp. boothii
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