Aeonium
General Information   |   Species   |   Hybrids   |   Cultivars

x hawbicum   Bramwell & Rowley, 1973

Par: Aeonium haworthii  Webb & Berthel. × Aeonium urbicum  (Hornem.) Webb & Berthel.

Aeonium haworthii  Webb & Berthel. × Aeonium urbicum  (Hornem.) Webb & Berthel., Semperviva of the Canary Islands area, Proceedings of the Royal Irish Academy 38 Sect.B (1): 474, t.11, fig. 15. (24 Sep) 1929.

Aeonium ×hawbicum  Bramwell & G.D.Rowley, in Jacobsen & Rowley, Some name changes in succulent plants, Part V, National Cactus and Succulent Journal 28(1): 5. (Mar) 1973.

Aeonium mixtum  P.V.Heath, The type of Aeonium Webb & Berthelot, Calyx 2(2): 57. (Oct) 1992 nom. illeg. (Art. 52.1).

Etym: Condensed formula.

T: Islas Canarias, Tenerife, Los Silos Distr., 150-600m; 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): 474, t.11, fig. 15. (24 Sep) 1929. Autotype (Art. 9.1). The only included element.

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

Intermediate between the parents.

Stem thicker and branches fewer than in haworthii.

Rosette denser.

Leaves longer.

Inflorescence larger.

Flowers greenish-white or pinkish-white, devoid of the rather orange tinge that characterizes haworthii, at least in its native sunlight.

Flowering time : May - June.

In all the characters in which the hybrid departs from haworthii it approaches urbicum.

Not infrequent also in cultivation (mostly under the name haworthii), the result of crossing in greenhouses. Intermediates between the hybrid and each of the parents also occur, both in nature and in gardens, the result of secondary crossing, so that a series may be obtained presenting every gradation from one parent to the other.



Aeonium ×hawbicum HT from Praeger, Semperviva of the Canary Islands area, Proceedings of the Royal Irish Academy 38 Sect.B (1): 474, t.11, fig. 15. (24 Sep) 1929.

Aeonium ×pseudohawbicum

Par: Aeonium haworthii  Webb & Berthel. × Aeonium pseudourbicum  Bañares

[or  Aeonium haworthii  Webb & Berthel. × Aeonium urbicum if pseudourbicum is not considered to be distinct from urbicum]

 

Aeonium ×pseudohawbicum  Bañares, Híbridos de la familia Crassulaceae en las islas Canarias. Novedades y datos corológicos. III. Vieraea 25: 190-181. 1996 (publ. 1997). [Based on Aeonium haworthii  Webb & Berthel. × Aeonium pseudourbicum  Bañares]

 

Etym: From the Greek prefix pseudo-, false, and a condensed formula.

 

T: Islas Canarias, Tenerife, nr. Las Portelas, 800m; May 1994, Ángel  Bañares

 

HT: TFC 37.972.

 

Obs: When Aeonium pseudourbicum  Bañares is treated as being the same as Aeonium urbicum  (Hornem.) Webb & Berthel., this taxon becomes an illegitimate synonym of Aeonium ×hawbicum  Bramwell & G.D.Rowley (1973).



Aeonium ×pseudohawbicum  Protologue illustration from Bañares, Híbridos de la familia Crassulaceae en las islas Canarias. Novedades y datos corológicos. III, Vieraea 25: 191. 1996 (publ. 1997).

 




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