Notes on the taxonomy ofAeonium urbicumandA. appendiculatumsp. nova (Crassulaceae)

Abstract

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The importance of phylogeny and ecology in microgeographical variation in the morphology of four Canarian species of Aeonium (Crassulaceae)

“…In the taxonomic literature, characters related to leaf form, pubescence of flowers and height of the individual plants are among those that distinguish A. urbicum and A. appendiculatum from the two other species (Liu, 1989;Bañares Baudet, 1992). Aeonium pseudourbicum is distinguishable from A. hierrense based on its leaf form (Bañares Baudet, 1992) whereas size of inflorescences and flower organs and the morphology of ovaries and styles distinguish A. urbicum from A. appendiculatum (Bañares Baudet, 1999). The nested ANOVAs on morphological variables confirm that species can be separated based on variation in leaf form, inflorescence width, pubescence of floral organs and flower size.…”

“…Aeonium appendiculatum was formerly regarded as a slightly divergent form of A. urbicum of Tenerife (Liu, 1989) and has only recently been named as a separate species (Bañares Baudet, 1999). The obtained AFLPs in the present investigation clearly suggest that the monocarpic Aeonium of La Gomera is genetically divergent from other species in the section and therefore support its taxonomic separation.…”

Little interspecific pollen transfer despite overlap in pollinators between sympatric Aeonium (Crassulaceae) species pairs

“…ex Hornem.) T.H.M.Mes, Aeonium haworthii Webb & Berthel., Aeonium pseudourbicum Bañares (sensu Bañares Baudet, 1999), Aeonium sedifolium (Webb ex Bolle) J.Pitard & L.Proust and Aeonium spathulatum (Hornem.) Praeger were selected for the study.…”