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]), 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.

"dm" is not declared as a valid unit of measurement for this property.

perigynous +  and hypogynous +
Reid V. Moran +
(Linnaeus) Webb & Berthelot +
Sempervivum arboreum +
9 cm90 mm <br />0.09 m <br /> (15 cm150 mm <br />0.15 m <br />) +
bright green +
lobed +  and toothed +
oblong-oblanceolate +
5 cm50 mm <br />0.05 m <br /> (9 cm90 mm <br />0.09 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
not circumscissile +
whorled +, opposite +  and alternate +
not circumscissile +
conic;ovoid +
Calif. +, Atlantic Islands (Canary Islands [Gran Canaria]) +, also s Europe +  and n Africa (Mediterranean coast) +
0-100 m +
[6-]7-12[-16]-merous +
2 cm20 mm <br />0.02 m <br /> (?) +
spreading;erect +
Cliffs and banks near sea +
axillary +  and terminal +
alternate +  and crowded +
persistent +
connate +
semi-inferior +  and superior +
tenuinucellate +, crassinucellate +  and bitegmic +
perigynous +  and hypogynous +
nearly +  and distinct +
Flowering spring. +
(3-)4-5(-12)[-30+]-carpellate +
nearly +  and distinct +
Hist. Nat. Îles Canaries +
flattish +  and concave +
cross-ribbed +  and ribbed +
ellipsoidal +
1 +  and many +
Introduced +
adnate +  and free +
antipetalous +
2 times as many as sepals +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
distinct +
2+ times shorter than ovary +
Aeonium arboreum var. arboreum +
Aeonium arboreum +
variety +
not conspicuous +
perennial +, biennial +  and annual +
pubescent +  and glabrous +