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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CISTACEAE

ROCK-ROSE FAMILY

Elizabeth McClintock

Perennial, shrub; hairs short and in stellate clusters, or short or long and simple, peltate, or glandular
Stem erect, generally branched
Leaves simple, generally opposite, entire, petioled or not; stipules present or 0
Inflorescence: cyme (raceme- or panicle-like), or flowers solitary
Flower generally bisexual, radial; sepals 5, outer 2 often narrower, bract-like, or 3, often persistent in fruit; petals generally 5, generally ephemeral; stamens generally many, free, ± persistent in fruit or not; ovary superior, chamber 1 (or appearing as 3–10 from intruded parietal placentas), style 1 or 0, stigma generally 1, entire or 3–10-lobed
Fruit: capsule, loculicidal, 3–10-valved
Seeds 3–many
Genera in family: 8 genera, 165 species: warm temp, especially Medit; some cultivated (Cistus ; Helianthemum ; Tuberaria )
Reference: [Brizicky 1964 J Arnold Arbor 45:346–357]
Fls open in sunshine for < 1 day.

HELIANTHEMUM

SUN-ROSE, RUSH-ROSE

Perennial, shrub, evergreen; hairs generally in stellate clusters, rarely glandular (except inflorescence), very sparse to dense
Stem generally erect, ± broom-like
Leaves cauline, generally alternate in CA, generally linear to lanceolate or oblanceolate, ± sessile; stipules present or 0
Inflorescence raceme- or panicle-like
Flower: sepals 5, outer 2 generally narrower; petals yellow; stamens 10–many; style < 2 mm, stigma ± hemispheric
Fruit generally 3-valved
Seeds 3–many
Species in genus: ± 120 species: ± range of family
Etymology: (Greek: sun flower)
Reference: [Daoud & Wilbur 1965 Rhodora 67:63–82, 201–216, 255–312]
CA species especially abundant after fire.

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bioregional map for HELIANTHEMUM being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Helianthemum
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