Warionia (Asteraceae): A relict genus of Cichorieae?

The genus Warionia, with its only species W. saharae, is endemic to the northwestern edge of the African Sahara desert. This is a somewhat thistle-like aromatic plant, with white latex, and fleshy, pinnately-partite leaves. Warionia is in many respects so different from any other genus of Asteraceae...

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Detalles Bibliográficos
Autores principales: Katinas, Liliana, Tellería, María Cristina, Susanna, Alfonso, Ortiz, Santiago
Formato: Articulo
Lenguaje:Inglés
Publicado: 2008
Materias:
Ciencias Naturales
Botánica
Asteraceae
chromosome number
Cardueae
Cichorieae
Cirsium
laticifers
pollen
Gundelieae
Mutisieae
taxonomy
Warionia
Warionia saharae
África
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/34828
http://rjb.revistas.csic.es/index.php/rjb/article/view/299/294
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-34828
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Botánica
Asteraceae
chromosome number
Cardueae
Cichorieae
Cirsium
laticifers
pollen
Gundelieae
Mutisieae
taxonomy
Warionia
Warionia saharae
África
spellingShingle Ciencias Naturales
Botánica
Asteraceae
chromosome number
Cardueae
Cichorieae
Cirsium
laticifers
pollen
Gundelieae
Mutisieae
taxonomy
Warionia
Warionia saharae
África
Katinas, Liliana
Tellería, María Cristina
Susanna, Alfonso
Ortiz, Santiago
Warionia (Asteraceae): A relict genus of Cichorieae?
topic_facet Ciencias Naturales
Botánica
Asteraceae
chromosome number
Cardueae
Cichorieae
Cirsium
laticifers
pollen
Gundelieae
Mutisieae
taxonomy
Warionia
Warionia saharae
África
description The genus Warionia, with its only species W. saharae, is endemic to the northwestern edge of the African Sahara desert. This is a somewhat thistle-like aromatic plant, with white latex, and fleshy, pinnately-partite leaves. Warionia is in many respects so different from any other genus of Asteraceae, that it has been tentatively placed in the tribes Cardueae, Cichorieae, Gundelieae, and Mutisieae. Until now, a comprehensive study of Warionia to have a complete context for discussing its taxonomic position is lacking. The general morphology, anatomy, palynology and chromosome number of W. saharae are investigated here, and the species is described and illustrated. Laticifers in leaves and stems indicate a relationship with Cichorieae, and are associated with the phloem, in contact with it or with the surrounding sclerenchyma sheath. The pollen features indicate a strong relation with Cardueae, namely the structure with Anthemoid pattern where the columellae are joined to the foot layer, the ectosexine with thin columellae, the endosexine with stout and ramified columellae, the conspicuous spines with globose bases and conspicuous apical channels, and the tectum surface very perforate. Chromosomal counts resulted in 2n = 34. The morphological and palynological evidence positions Warionia between the tribes Cardueae and Cichorieae suggesting that it could be a remnant of the ancestral stock that gave rise to both tribes.
format Articulo
Articulo
author Katinas, Liliana
Tellería, María Cristina
Susanna, Alfonso
Ortiz, Santiago
author_facet Katinas, Liliana
Tellería, María Cristina
Susanna, Alfonso
Ortiz, Santiago
author_sort Katinas, Liliana
title Warionia (Asteraceae): A relict genus of Cichorieae?
title_short Warionia (Asteraceae): A relict genus of Cichorieae?
title_full Warionia (Asteraceae): A relict genus of Cichorieae?
title_fullStr Warionia (Asteraceae): A relict genus of Cichorieae?
title_full_unstemmed Warionia (Asteraceae): A relict genus of Cichorieae?
title_sort warionia (asteraceae): a relict genus of cichorieae?
publishDate 2008
url http://sedici.unlp.edu.ar/handle/10915/34828
http://rjb.revistas.csic.es/index.php/rjb/article/view/299/294
work_keys_str_mv AT katinasliliana warioniaasteraceaearelictgenusofcichorieae
AT telleriamariacristina warioniaasteraceaearelictgenusofcichorieae
AT susannaalfonso warioniaasteraceaearelictgenusofcichorieae
AT ortizsantiago warioniaasteraceaearelictgenusofcichorieae
bdutipo_str Repositorios
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