Size: To 3' tall and wide
Leaves in whorls or rosettes, bright green. Well-drained soil. Yellow flowers on stems above the leaves.
From Bot. Reg. (Sempervivum arboreum)
An arborescent succulent shrub, from three to seven feet in height; well characterized by the name of Tree-Houseleek, being what we might conceive our own humble native stemless weed of the same generic name would become on assuming the dimensions and characters of a tree.
'Zwartkop' - rosettes of burgundy to black leaves, yellow flowers.
Published in Hist. Nat. Iles Canaries (Phytogr.) 1: 185 in 1836.
Native to the Canary Islands and Morocco.
Basionym Sempervivum arboreum L. - From Bot. Reg.
One of our most common rate greenhouse-plants, and of the longest standing, having been cultivated here from before 1640; but is not very frequently seen in bloom, and is rather impatient of frost... Native of the Levant. Frequent in Portugal, where, altho' completely naturalized, Brotero suspects it is not aboriginal. Its favourite spots are rocks, old walls, and ruins. Dr. Sibthorpe found it in the island of Cyprus; the spanish botanist, Don Josef Quer, in Gallicia, growing on the walls which environ the city of Vigo.