Sixalix farinosa

Sixalix farinosa
Description de l'image Scabiosa farinosa.jpg.
Classification APG III (2009)
Règne Plantae
Clade Angiospermes
Clade Dicotylédones vraies
Clade Noyau des Dicotylédones vraies
Clade Astéridées
Clade Campanulidées
Ordre Dipsacales
Famille Caprifoliaceae
Genre Sixalix

Espèce

Sixalix farinosa
(Coss.) Greuter & Burdet 1985

Sixalix farinosa est une espèce de plantes à fleurs de la famille des Caprifoliaceae (anciennement Dipsacaceae) endémique de la Tunisie et de l'Algérie[1].

Description générale

Sixalix farinosa est une plante basse, ramifiée, ligneuse à la base. Les tiges sont couchées, courtes. Les feuilles sont rétrécies à la base et arrondies au sommet, spatulées, crénelées. Elles sont blanchâtres en dessous. Les hampes florales striées portent des folioles réunies en involucres. Les fleurs violacées, épanouies entre avril et juin, sont réunies en capitules hémisphériques[2].

Espèce très affine du Sixalix cartenniana, les deux espèces dériveraient d'une souche commune.

Taxinomie

L'espèce a été décrite la première fois par Ernest Cosson en 1884 sous le nom de Scabiosa farinosa[3]. Elle a été transférée au genre Sixalix par Werner Rodolfo Greuter et Hervé Maurice Burdet en 1985[1].

Son nom vernaculaire français est la Scabieuse à feuilles farineuses[2] par l'aspect du revers de ces dernières.

Écologie

Cette espèce était considérée comme une endémique strictement tunisienne jusqu'en 2004, quand elle fut découverte en Algérie. Elle est ainsi présente dans deux zones distantes de 200 à 300 km : à l'ouest la zone transfrontalière d'Annaba, El Kala et Tabarka et à l'est la péninsule du cap Bon et l'île de Zembra [4].

Elle y apprécie les pâturages montagneux et les rochers côtiers[5].

Notes et références

  1. ↑ a et b Base de données des plantes d'Afrique (BDPA), consulté le 14 octobre 2013
  2. ↑ a et b Pottier-Alapetite 1981, p. 928.
  3. ↑ Cosson et Barratte 1893, p. 58-59.
  4. ↑ Véla et al. 2012.
  5. ↑ Cosson et Barratte 1893, p. 59.

Voir aussi

Bibliographie

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