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Annual to shrub [(± tree-like or climbing)], fleshy. Leaf: generally simple, alternate or opposite, in dense to open, basal (or terminal) rosettes or basal and cauline, not in rosettes, reduced distally or not, margin often ± red. Inflorescence: generally cyme, generally bracted. Flower: generally bisexual; sepals generally 3–5, generally ± free; petals generally 3–5, ± free or fused; stamens >> to = sepals, epipetalous or not; pistils generally 3–5, simple, fused at base or not, ovary 1-chambered, placenta 1, parietal, ovules 1–many, style 1. Fruit: follicles, generally 3–5. Seed: 1–many, small.
± 33 genera, ± 1400 species: ± worldwide, especially dry temperate; many cultivated for ornamental. [Eggli (ed.) 2003 Illus Handbook Succulent Plants 6 (Crassulaceae). Springer] Water-stressed plants often ± brown or ± red. Consistent terminology regarding leaves, bracts difficult; in taxa with rosettes (e.g., Aeonium, Dudleya, some Sedum), structures in rosettes are leaves, those on peduncles are bracts, and those subtending flowers are flower bracts; in taxa where inflorescence is terminal, rosette leaves may "become" bracts as stem rapidly elongates to form inflorescence. Seed numbers given per follicle. —Scientific Editor: Thomas J. Rosatti.
Key to Crassulaceae
Perennial herb, fleshy, glabrous, bisexual. Stem: generally caudex- or corm-like, branched or not, ± covered with dried leaves. Leaf: in rosettes, evergreen or ± deciduous in summer (withering, falling or not), waxy or not, base wounding purple-red (yellow) or generally not. Inflorescence: cyme; flower bracts ± subtending pedicels, < bracts; bracts alternate. Flower: sepals 5, fused below; petals 5, fused at base, erect to spreading above; stamens 10, epipetalous; carpels 5, ± fused below. Fruit: follicles 5, erect to spreading, many-seeded. Seed: < 1 mm, narrowly ovoid, brown, striate.Key to Dudleya
± 46 species: southwestern North America; some used as groundcover or cultivated for ornamental. (W.R. Dudley, 1st head of Botany Department, Stanford University, 1849–1911) [Thiede 2003 in Eggli (ed.) Illus Handbook Succulent Plants 6 (Crassulaceae):85–103. Springer] Fruit just before opening generally most reliable for orientation; insect damage may cause branching in taxa characterized as non-branching.
Unabridged note: Whether or not leaves of Dudleya cymosa subsp. costatifolia, Dudleya saxosa subsp. saxosa, Dudleya variegata wound purple-red, red, yellow, or some other color at base when removed is evidently unknown.
Covered with dense, mealy powder or chalky wax; rosette 1, 7–60 cm wide, white. Stem: 4–9 cm wide. Leaf: evergreen, 40–60, 8–25(27) cm, 3–10 cm wide, 3–10 mm thick, oblong, base 3–8 cm wide, tip acuminate to mucronate [to acute]. Inflorescence: peduncle 30–100(150) cm, 5–20 mm wide; 1° branches 2–6, branched 0–1 ×; terminal branches twisted at base, nodding in youth, spreading in age; pedicels 5–30(35) mm, reflexed in bud, in fruit often sharply bent, erect, becoming red. Flower: pendent; sepals waxy; petals 11–19 mm, fused 6–10 mm, red, with some wax.
2n=34. ± common. Rocky cliffs, canyons; generally < 1000 m. c&s Central Coast, s Outer South Coast Ranges, South Coast, Transverse Ranges, Peninsular Ranges; northern Baja California. Hybridizes with Dudleya lanceolata. May–Jul [Online Interchange]
Unabridged note: In Baja California may grade into Dudleya anthonyi Rose, which may best be treated as a subsp. of Dudleya pulverulenta.
Previous taxon: Dudleya parva
Next taxon: Dudleya saxosa
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Feb 1 2015
Citation for this treatment: [Author of taxon treatment] 2013. Dudleya, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=23669, accessed on Feb 1 2015
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© 2003 Robert Buckley
|Geographic subdivisions indicated for the distribution of Dudleya pulverulenta|| 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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(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
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