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University of California, Berkeley
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Vascular Plants of California
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Clarkia rhomboidea


Higher Taxonomy
Family: OnagraceaeView DescriptionDichotomous Key
Common Name: EVENING-PRIMROSE FAMILY
Habit: Annual to perennial herb (to tree). Leaf: cauline or basal, alternate, opposite, or whorled, generally simple and toothed (to pinnately compound); stipules 0 or generally deciduous. Inflorescence: spike, raceme, panicle, or flowers 1 in axils; bracted. Flower: generally bisexual, generally radial, often opening at either dawn or dusk; hypanthium generally prolonged beyond ovary (measured from ovary tip to sepal base); sepals 4(2--7); petals 4(2--7, rarely 0), often fading darker; stamens 2 × or = sepals in number, anthers 2-chambered, opening lengthwise, pollen interconnected by threads; ovary inferior, chambers generally as many as sepals (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, spheric, or hemispheric. Fruit: capsule, loculicidal (sometimes berry or indehiscent and nut-like). Seed: sometimes winged or hair-tufted.
Genera In Family: 22 genera, +- 657 species: worldwide, especially western North America; many cultivated (Clarkia, Epilobium, Fuchsia, Oenothera). Note: Gaura moved to Oenothera. Fuchsia magellanica Lam. naturalized in northern California.
eFlora Treatment Author: Warren L. Wagner & Peter C. Hoch, family description, key to genera, treatment of genera by Warren L. Wagner, except as noted
Scientific Editor: Robert W. Patterson, Bruce G. Baldwin.
Genus: ClarkiaView DescriptionDichotomous Key


Habit: Annual < 1.5 m. Stem: prostrate to erect, glabrous, often glaucous, or puberulent (hairs long, spreading). Leaf: pinnately veined; petiole < 4 cm or 0; blade 1--10 cm, linear to elliptic or ovate, entire or shallow-toothed, glabrous or sparsely puberulent. Inflorescence: spike, raceme; bracts leaf-like; axis in bud straight or recurved at tip, in flower +- straight; buds erect or not. Flower: hypanthium obconic to cup-shaped, or long, slender, generally with ring of hairs within; sepals 4, generally fused to tip in bud, reflexed at least at base, staying fused at least at tip, in 4s or 2s, or all coming free; corolla bowl-shaped to rotate, petals 5--60 mm, often lobed or clawed, lavender or pink to dark red, pale yellow, or white, often spotted, flecked, or streaked with red, purple, or white; stamens 8, in 2 like or unlike series, or 4, filaments cylindric to wider distally, subtended by ciliate scales or generally not, anthers attached at base, pollen white or yellow to blue-gray, lavender, or +- red; ovary 4-chambered, glabrous or not, cylindric, fusiform, or wider distally, generally shallowly to deeply 4- or 8-grooved, stigma lobes 4, generally prominent. Fruit: generally capsule, elongate (short, indehiscent, nut-like). Seed: generally many, rarely 1--2, 0.5--2 mm, angled, crested or not, brown, gray, or mottled.
Etymology: (Captain William Clark, 1770--1838, of Lewis & Clark Expedition) Note: Self-fertile; self-pollinated or outcrossed; on herbarium specimens, curvature of inflorescence axis in bud generally reliable, pollen color generally not.
eFlora Treatment Author: Harlan Lewis
Reference: Lewis & Lewis 1955 Univ Calif Publ Bot 20:241--392
Clarkia rhomboidea Douglas
NATIVE
Stem: erect, < 1 m, puberulent. Leaf: petiole 5--25 mm; blade 1--6 cm, lanceolate to elliptic or ovate. Inflorescence: axis in bud recurved at tip; buds pendent. Flower: hypanthium 1--3 mm; sepals all coming free; corolla rotate, petals 6--12 mm, pink-lavender, generally spotted, claw broad, 2-lobed, blade lanceolate to widely ovate or diamond-shaped; stamens 8, subtended by ciliate scales, anthers alike, pollen blue-gray; ovary 4-grooved, stigma not exserted beyond anthers. Chromosomes: n=12.
Ecology: Common. Yellow-pine forest, woodland; Elevation: < 2500 m. Bioregional Distribution: CA-FP (exc SnJV), MP; Distribution Outside California: +- western United States, Baja California. Flowering Time: Mar--Sep Note: From hybrids between species related to Clarkia mildrediae, Clarkia virgata.
Jepson eFlora Author: Harlan Lewis
Reference: Lewis & Lewis 1955 Univ Calif Publ Bot 20:241--392
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

Previous taxon: Clarkia purpurea subsp. viminea
Next taxon: Clarkia rostrata

Botanical illustration including Clarkia rhomboideabotanical illustration including Clarkia rhomboidea


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Citation for this treatment: Harlan Lewis 2012, Clarkia rhomboidea, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=19595, accessed on December 03, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on December 03, 2024.

Clarkia rhomboidea
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©2009 Keir Morse
Clarkia rhomboidea
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©2008 Keir Morse
Clarkia rhomboidea
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©2014 Neal Kramer
Clarkia rhomboidea
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©2010 George W. Hartwell
Clarkia rhomboidea
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©2010 Barry Breckling

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Geographic subdivisions for Clarkia rhomboidea:
CA-FP (exc SnJV), MP
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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 occurrence).






 

Data provided by the participants of the  Consortium of California Herbaria.

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All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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CCH collections by month Flowering-Fruiting Monthly Counts

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).