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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 or fused at very base, 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: [1–]3–many.
8 genera, ± 175 species: temperate, especially southeastern United States, Mediterranean; some cultivated (Cistus; Crocanthemum; Tuberaria). [Arrington 2004 Ph.D. Dissertation Duke Univ] Flowers open in sunshine for < 1 day. Taxa of Helianthemum in TJM2 treated here in Crocanthemum. —Scientific Editors: Thomas J. Rosatti, Bruce G. Baldwin.
Unabridged references: [Strother FNANM, in press]
Key to Cistaceae
Shrub, evergreen. Stem: < 2.5 m. Leaf: generally opposite, petioled or not; stipules 0. Inflorescence: panicle-like or flowers 1. Flower: sepals 3 or 5; petals 4–5, white (often drying ± yellow) or rose to purple, with red or yellow near base or not, often ± wrinkled; ovary 1-chambered, placentas 5, style 0 or 1, stigma large, hemispheric, 5–12-lobed. Fruit: valves 5–12.Key to Cistus
± 20 species: Mediterranean; cultivated as ornamental. (Ancient Greek name) [Guzman & Vargas 2005 Molec Phylogen Evol 37:644–660] Plants including hybrids sometimes escape cultivation; scented resin from some species may be myrrh of biblical, other references.
Stem: < 1 m; hairs generally glandular and nonglandular. Leaf: sessile, 15–60 mm, linear to lance-linear, wrinkled adaxially, main veins from base generally 3; margin generally rolled under, ± not ciliate. Inflorescence: 1–11-flowered; pedicel 5–15 mm. Flower: sepals 5, outer rounded to broadly wedge-shaped at base; petals 1–2 cm, white; style ± 0. Fruit: valves 5.
2n=18. Uncommon. Disturbed places; < 300 m. North Coast, Central Coast (Carmel Highlands); native to southern Europe, northern Africa. Apr–Oct [Online Interchange]
Previous taxon: Cistus ladanifer
Next taxon: Cistus psilosepalus
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Mar 12 2014
Citation for this treatment: [Author of taxon treatment] 2012. Cistus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=19515, accessed on Mar 12 2014
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