Jepson Flora Project: Jepson Interchange    

 
link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

    THIS PAGE IS NO LONGER UPDATED
    AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

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.

Native

H. greenei B.L. Rob.

ISLAND RUSH-ROSE


Stem 15–30 cm
Leaf 7–30 mm, 1–4 mm wide, linear-lanceolate to oblanceolate
Flower: outer sepals 2.5–4 mm, 0.5–1 mm wide, lanceolate; inner sepals 4.5–7 mm, 3–4 mm wide, ovate, acuminate; petals 5–8 mm, obovate; stamens 20–25
Fruit 4–6 mm, ovoid
Seeds ± 15
Ecology: Dry, rocky slopes, ridges, chaparral
Elevation: < 300 m.
Bioregional distribution: Channel Islands.Threatened by grazing.
See the CNPS Inventory for information about endangerment and rarity.
previous taxon | next taxon
bioregional map for HELIANTHEMUM%20greenei being generated
 


Retrieve Jepson Interchange Index to Plant Names entry for Helianthemum greenei
Retrieve dichotomous key for Helianthemum
Retrieve multiple-entry key (MEKA) for Helianthemum
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
Return to the Jepson Interchange main page
Return to treatment index page
Glossary


University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California