Aichryson Webb & Berthel 1840
(mice ears, 'Oreja de Ratón')
Aichryson is a genus of around 15 species of small tender succulent plants and sub-shrubs, of which 10 species are Canary Islands endemics and others are from the Azores, Madeira and Morocco. They are related to the Canary Islands genera Aeonium and Monanthes which also have polymerous (many-parted) yellow flowers. The succulent leaves are pubescent to densely hairy. The inflorescence is a loose raceme of dozens to hundreds of sulphur-yellow to greenish-yellow star-shaped flowers.
Aichryson grow as understory plants in the endemic laurel and pine forests of the Canary Islands and prefer to grow in slightly shaded moist soil with plenty of humus. They tolerate a cool, frost-free winter kept fairly dry. Some species are annuals or biennials, but the shrubby perennials also need to be re-started from cuttings on a regular basis to be at their best. Many species produce volunteer seedlings around themselves after flowering.