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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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.



Shrub, evergreen, hairy
Stem < 2.5 m
Leaves generally opposite, ovate to oblong, petioled or not; stipules 0
Inflorescence panicle-like or flowers solitary
Flower: sepals 3 or 5; petals white or pink to purple, generally with dark or yellow blotch at base; ovary 1-chambered, placentas 5, style 1 or 0, stigma large, hemispheric, 5–10-lobed
Fruit 5–10-valved
Etymology: (Ancient Greek name)
Reference: [Bean 1970 Trees & shrubs Brit Isles I:615–629]
Some hybrids and cultivars.


C. ladanifer L.


Stem 1–2.5 m, shiny, resinous, sticky, with sessile glands
Leaf sessile, 4–8 cm, linear-lanceolate to narrow-oblong, generally with 3 main veins from base
Inflorescence: flowers solitary at ends of lateral branchlets
Flower: sepals 3; petals 3–5 cm, white, generally with red or yellow blotch at base; style short
Ecology: Uncommon. Disturbed places
Elevation: < 300 m.
Bioregional distribution: s Central Coast, San Gabriel Mountains
Distribution outside California: native to sw Europe
[sometimes mispelled ladaniferus]

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bioregional map for CISTUS%20ladanifer being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Cistus ladanifer
Retrieve dichotomous key for Cistus
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
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