x praegeri  Kunkel, 1969

Par: Aeonium simsii (Sweet) Stearn × Aeonium undulatum Webb & Berthel.

Aeonium caespitosum Webb & Berthel. × Aeonium undulatum Webb & Berthel., Praeger, Semperviva of the Canary Islands area, Proceedings of the Royal Irish Academy 38 Sect.B (1): 467, t.9, fig. 3. (24 Sep) 1929.

Aeonium ×praegeri G.Kunkel, Notas misceláneas: Nombre nuevo para un hibrido: Aeonium ×praegeri, Cuadernos de Botánica Canarias 5: 50-51. 1969. ("praegerii").

Etym: Named for its discoverer Robert Lloyd Praeger (1865-1953).

T: Islas Canarias, Gran Canaria, Tenteniguada, Baranco Umbrada, Cueva del Corcho, 960m.; 1924, R. Lloyd Praeger.

HT: Sketch of leaf in Praeger, Semperviva of the Canary Islands area, Proceedings of the Royal Irish Academy 38 Sect.B (1): 467, t.9, fig. 3. (24 Sep) 1929. Autotype (Art. 9.1). The only included element.

Description (according to Praeger, An Account of the Sempervivum Group, 1932) :

Stem thick, dark grey, rather long.

Leaves large, about 12 x 4 cm, narrowly obovate-spathulate, acute, glabrous, underside thickly lined with very long green immersed glands, margin with slender erect or reflexed hyaline broad-based cilia.

Flowering time : May.

"The leaves are less spathulate than in undulatum, and nearly as large, very different from the strap-shaped ones of caespitosum, whose influence appears especially in the crowded long glands on the under side of the leaf; the length of the leaves and the very long glands exclude the small-leaved spathulatum as a possible parent - it also possesses immersed glands, but they are very short and few" (Praeger 1929).

See also : The genus Aeonium on Gran Canaria by Marco Cristini