Aichryson


Aichryson is a genus of about 15 species of succulent, subtropical plants, mostly native to the Canary Islands, with a few in the Azores, Madeira and Morocco, and one in Portugal.
The species of Aichryson are not frost-resistant. They are related to Sempervivum, Jovibarba, Greenovia, Aeonium and Monanthes, readily seen in their similar flowers.
The genus name comes from a contraction of the Greek "aei" and "chrysos".
Several species are cultivated as ornamental plants. The hybrid cultivar Aichryson × aizoides var. domesticum 'Variegatum' is a recipient of the Royal Horticultural Society's Award of Garden Merit.

Taxonomy

Recent phylogenentic studies of Crassulaceae indicate that Aichryson is closely related to Monanthes and Aeonium. Two other genera of Crassulaceae that have many-parted flowers are not closely related to the three Canary Island genera.
On the Canary Islands, the center of species diversity seems to be the island of La Palma.
Relationships within Aichryson were investigated by Fairfield et al. . They found that the five subspecies of A. pachycaulon were not each other's closest relatives and additional species may need to be erected after additional study.

Species

Other species recognized by Nyffeler in Eggli 2004 are:
A recently named species is: