Aeonium arboreum var. arboreum

Introduced
Treatment appears in FNA Volume 8. Treatment on page 168.

Shrubs rather open, 10[–20] dm, without prop roots. Stems branched, 10–40 mm thick, fleshy; bark nearly smooth. Leaves: rosettes dense, concave or flattish, 50–75-leaved, 1–2 dm diam.; blade shiny, bright green [purple-black], oblong-oblanceolate, 5–9(–15) cm, 1.5–3 mm thick, firm, marginal cilia spreading to ascending, wavy, surfaces glabrous. Cymes dense, conic to ovoid, 1–2+ dm, puberulent. Flowers rotate, 2 cm diam.; calyx puberulent; petals 9–11, spreading, bright yellow. 2n = [36,] 72.


Phenology: Flowering spring.
Habitat: Cliffs and banks near sea
Elevation: 0-100 m

Distribution

V8 338-distribution-map.gif

Introduced; Calif., Atlantic Islands (Canary Islands [Gran Canaria]), introduced also s Europe, n Africa (Mediterranean coast).

Discussion

The tetraploid race of var. arboreum is widely grown in areas of Mediterranean climate, including California. Although widely naturalized in the Mediterranean region, it is only local in Los Angeles and San Diego counties, southern California, on the coast and about trash heaps and old gardens.

Selected References

None.

Lower Taxa

None.

Reid V. Moran +
(Linnaeus) Webb & Berthelot +
Sempervivum arboreum +
Calif. +, Atlantic Islands (Canary Islands [Gran Canaria]) +, introduced also s Europe +  and n Africa (Mediterranean coast). +
0-100 m +
Cliffs and banks near sea +
Flowering spring. +
Hist. Nat. Îles Canaries +
Introduced +
Aeonium arboreum var. arboreum +
Aeonium arboreum +
variety +