Abstract
Graptopetalum is a genus of approximately 17 species of mainly dry habitats from Arizona to Oaxaca. Circumscription of the genus has been problematic. A cladistic analysis was performed based on 39 morphological characters to determine ifGraptopetalum constitutes a monophyletic group and to determine the relationships among the species. Results indicate thatGraptopetalum is not monophyletic. A large clade that includes most of the species ofGraptopetalum is weakly supported. In this clade, two subclades received moderate support, one formed by the acaulescent species and another by the haplostemonous taxa.
Resumen
Graptopetalum es un género de aproximadamente 17 especies principalmente de zonas áridas desde Arizona hasta Oaxaca. La circunscripción del género ha sido problemática. En este artículo se llevó a cabo un análisis cladístico con base en 39 caracteres morfológicos para determinar siGraptopetalum constituye un grupo monofilético y para determinar las relaciones entre sus especies. Los análisis recobraron un clado débilmente soportado que incluye a la mayoría de las especies deGraptopetalum. Dentro de este clado dos subclados recibieron un soporte moderado, uno formado por las especies acaulescentes y otro por las especies haplostémonas.
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Acevedo-Rosas, R., Sosa, V. & Lorea, F.G. Phylogenetic relationships and morphological patterns in Graptopetalum (Crassulaceae). Brittonia 56, 185–194 (2004). https://doi.org/10.1663/0007-196X(2004)056[0185:PRAMPI]2.0.CO;2
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DOI: https://doi.org/10.1663/0007-196X(2004)056[0185:PRAMPI]2.0.CO;2