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©Copyright 1993 by the Regents of the University of California
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CRASSULACEAE

STONECROP FAMILY

Annual to subshrubs, fleshy
Leaves generally simple, generally basal and cauline, alternate or opposite, generally reduced upward
Inflorescence: generally cyme, generally bracted
Flower: sepals generally 3–5, generally ± free; petals generally 3–5, ± free or fused; stamens = to >> sepals, free or epipetalous; pistils generally 3–5, simple (sometimes fused at base), ovary 1-chambered, placenta 1, parietal, ovules 1–many, style 1
Fruit: follicles generally 3–5
Seeds 1–many, small
Genera in family: ± 30 genera, ± 1500 species: ± worldwide, especially dry temp; many cultivated for ornamental. Family description and generic key by Melinda F. Denton and Reid Moran.

AEONIUM

Reid Moran

Perennial, shrub
Leaves crowded at branch tips, alternate, generally obovate to oblanceolate, generally ciliate
Inflorescence: cyme, terminal; branches many, 1-sided
Flower: sepals 6–16, ± free; petals ± free, > sepals; stamens 2 X sepal number
Seeds many, small, striate, brown
Species in genus: 31 species: Africa, Yemen, Madeira, Cape Verde, and especially Canary islands
Etymology: (Latin: name given to A. arboreum by Dioscorides, Greek botanist)
Reference: [Liu 1989 Natl Mus Nat Sci Taiwan Spec Publ 3]

Introduced

A. arboreum (L.) Webb & Berthel. var. arboreum

Subshrub 1(–2) m, ± open; adventitious prop roots 0
Stem 10–40 mm diam, fleshy, ± smooth; branches few, above
Leaves 50–75, 5–9(15) cm, 1.5–3 mm thick, oblong-oblanceolate, green or dark purple
Inflorescence: pedicel puberulent
Flower ± 2 cm wide, open; petals 9–11, yellow
Chromosomes: 2n=36,72
Ecology: Bluffs, dunes
Elevation: < 100 m.
Bioregional distribution: South Coast
Distribution outside California: native to Canary Islands

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