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| Jepson eFlora: Taxon page
Key to families | Table of families and genera |
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Indexes to all accepted names and synonyms: | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | |
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Annual to shrub, aromatic, of sunny areas, often sandy or chalky substrates; hairs nonglandular, in stellate clumps or not, peltate or not, and/or glandular.
Leaf: simple, alternate or opposite [ whorled], often ± reduced, entire or not, petioled or not, stipuled or not.
Inflorescence: raceme- or panicle-like cymes or flowers 1.
Flower: generally bisexual, ± radial; sepals 3 or 5 (outer 2 often narrower), free, often persistent in fruit, 3 twisted in direction opposite that of petals; petals [0(3)]4–5, generally ephemeral; stamens (3–10) many, free, often sensitive to touch, ± persistent in fruit or not; ovary superior, chambers 1 (or ± 3–12 from intruded parietal placentas), style 0–1, stigma 1(3), lobes 0 or 3–12.
Fruit: loculicidal capsule, valves 3–12.
Seed: 3–many.
8 genera, ± 175 species: temperate, especially se US, Medit; some cultivated (Cistus; Helianthemum; Tuberaria). [Arrington 2004 Ph.D. Dissertation Duke Univ] Fls open in sunshine for < 1 day. —Scientific Editors: Thomas J. Rosatti, Bruce G. Baldwin.
Unabridged references: [Strother FNANM, in press]
Perennial or subshrub, evergreen; hairs generally in stellate clumps, rarely glandular (except inflorescence), sparse to dense.Key to Helianthemum
Stem: generally erect, ± broom-like.
Leaf: basal 0; cauline generally alternate [ opposite], generally linear to lanceolate or oblanceolate, ± sessile.
Inflorescence: raceme- or panicle-like.
Flower: sepals 5, outer 2 generally narrower; petals yellow; stamens 5–many; style < 2 mm, stigma ± hemispheric.
Fruit: valves generally 3.
Seed: 3–many.
± 120 species: ± range of family. (Greek: sun flower) CA species especially abundant after fire, here retained in Helianthemum (polyphyletic) in lieu of combination in Crocanthemum (or Husonia) for Helianthemum greenei.
Unabridged note: Based on molecular and other data (as yet unpublished, by Jenny Arrington & Paul Manos) Helianthemum is polyphyletic; CA taxa are more closely related to Crocanthemum and Hudsonia than to Helianthemum; and although New World members are often now treated in Crocanthemum, they here are retained for now in Helianthemum because the relationship of California taxa to Crocanthemum versus Hudsonia remains uncertain and a combination has yet to be made in Crocanthemum (or Hudsonia) for Helianthemum greenei.
Previous taxon: Cistus salviifolius
Next taxon: Helianthemum greenei
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
Copyright © 2012 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.
| Bioregions in which taxon occurs | Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. |
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Chart based on elevation range in Manual and elevations and coordinates of CCH records. Data provided by the participants of the Consortium of California Herbaria. Note: About half of the CCH records include both elevation and coordinates. | Data provided by the participants of the Consortium of California Herbaria.
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