The Aeonium Page

Aeonium arboreum cv. Schwartzkopf (Zwartkop)  Webb & Berthelot (1840)
This selected cultivar has a large rosette of almost black leaves which is often seen as a feature plant in summer bedding. There are several similar cultivars with black rosettes.The ordinary green Aeonium arboreum is commoner in nature but seen less frequently in cultivation. The green form colours up in full sun to a lesser extent.

A large Aeonium arboreum produces an impressive panicle of small yellow flowers (left) and then dies. The plant usually offsets along the stem (middle left) before dying. Non-flowering rosettes on a flowering plant survive and can be propagated for the next year.
Aeonium arboreum is native to the Canary Islands. Several varieties have been described.

Aeonium canariense var. palmense  H.Y. Liu 1989  Syn: Aeonium palmense

 
Native to the Canary Islands (La Plama, El Hierro).

Aeonium decorum  Webb ex Bolle 1859
This densely-branching sub-shub has compact rosettes of ovate leaves, although the rosettes are planted out here as bedding.
 
Native to the Canary Islands (Gomera, Tenerife).

Aeonium gomerense  Praeger 1928

 
Native to the Canary Islands (Gomera).

Aeonium haworthii  Salm-Dyck ex Webb & Berthelot 1840
A densely-branched shrubby plant with flat blue-green 4 in rosettes, becoming reddened along leaf margins and tips. Leaf margins are finely ciliate. The inflorescence is a loose cluster of cream star-like flowers.
 
Native to the Canary Islands (Tenerife).

Aeonium leucoblepharum  Webb ex Richard 1848
A perennial shrubby plant. The older leaves of the light green rosettes become bronzed in strong light. The rounded ends of the leaves have a pointed tip and their margins are finely ciliate.
 
Native to Ethiopia, Kenya, Somalia, Uganda, Yemen, growing in mountains at elevations of 6500 - 11,000 ft.

Aeonium simsii  Stearn 1951
The bluish-green lanceolate leaves of this small plant have ciliate margins. The inflorescence is a peduncle of a few tens of greenish-yellow flowers on a leafy flower stem, arising from a basal leaf axil of the rosette.
 
Native to the Canary Islands (Gran Canaria), growing at elevations of up to 6000 ft.

Aeonium undulatum  Webb and Berthelot 1841
The usually unbranched stems carry terminal, flattened, green rosettes up to 12 in in dameter. Individual leaves are oblanceolate with fine ciliate margins which become reddened in full sun.
 
Native to the Canary Islands (Gran Canaria). The impressive rosettes and large flower head make a particularly fine specimen plant, but of course it will die after flowering.

Aeonium sp.
Labelled as Aeonium goodii but I haven't been able to verify this as a valid name.
A distinctive plant.