x castelloplanum   Bramwell & Rowley, 1973

Par: Aeonium castello-paivae  Bolle × Aeonium subplanum  Praeger

[or Aeonium canariense  (L.) Webb & Berthel. x Aeonium castello-paivae Bolle when subplanum is reduced to a variety of A. canariense. (Art. H.5.2)]

Aeonium castello-paivae  Bolle × Aeonium subplanum  Praeger, Semperviva of the Canary Islands area, Proceedings of the Royal Irish Academy 38 Sect.B (1): 468-469, t.9, fig. 5. (24 Sep) 1929.

Aeonium ×castelloplanum  Bramwell & G.D.Rowley, in Jacobsen & Rowley, Some name changes in succulent plants, Part V, National Cactus and Succulent Journal 28(1): 7. (Mar) 1973.

Etym: Condensed formula.

T: Islas Canarias, Gomera, near Degollada de San Sebastián & Hermigua; 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): 468, t.9, fig. 5. (24 Sep) 1929. Autotype (Art. 9.1). The only included element.

Obs: In Bañares (Vieraea 43: 191, 2015), Art. 40.1 (lack of type) is cited as a reason for a superfluous reneotypification, but Praeger's sketch was referred to in the validation by Bramwell & Rowley as “1929: 468-469”, the place of publication of the protologue description, where there is also a reference to the illustration as “Plate IX, fig. 5”. This is the only included element of Praeger's description and thus also of Bramwell & Rowley's validation.

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

Quite intermediate between the parents.

Stem erect, 7 mm thick, branches few, patent.

Rosettes dense, flattish.

Leaves 5 - 8 x 3 - 4 cm, glabrous on face and back, bright green, spathulate, margin with short thick blunt distant cilia mixed with fine glandular-pubescence.

Inflorescence large, lax, conical, glandular-pubescent.

Flowers 8-parted, openly campanulate, calyx glandular-pubescent, with deltoid-lanceolate acute theeth, petals linear-lanceolate, acuminate, 9 - 10 mm long, pale greenish-yellow, glandular-pubescent on back and edges.

Flowering time : May.

Habitat : Canary Islands : La Gomera, sparingly.