A new species of Cirsium (Compositae) from Deserta Grande (Madeira Archipelago, Portugal)

José Augusto Carvalho; Isamberto Silva; Alfonso  Susanna; Roser Vilatersana

doi:10.3989/collectbot.2025.v44.0013

Autores/as

José Augusto Carvalho Direção Regional do Ordenamento do Território https://orcid.org/0009-0002-8439-7457
Isamberto Silva Instituto das Florestas e Conservação da Natureza (IFCN, IP-RAM) https://orcid.org/0009-0000-6137-8021
Alfonso Susanna Botanical Institute of Barcelona (IBB), CSIC-CMCNB https://orcid.org/0000-0003-4717-9063
Roser Vilatersana Botanical Institute of Barcelona (IBB), CSIC-CMCNB https://orcid.org/0000-0002-5106-8764

DOI:

https://doi.org/10.3989/collectbot.2025.v44.0013

Palabras clave:

Archipiélago de Madeira, Asteraceae, Cardueae, Cirsium, Compositae, Islas Desertas, plantas vasculares

Resumen

Una nueva especie de Cirsium (Cardueae, Compositae), C. isambertoi de la isla Deserta Grande (Madeira Archipiélago, Portugal) es descrita y fotografiada. Esta nueva especie es morfológicamente similar a C. latifolium, un endemismo de la Isla de Madeira. La nueva especie difiere de C. latifolium por el tamaño de la planta (30 cm vs. 100 cm) y la forma de las hojas (profundamente pinnatífidas vs. ampliamente dentadas). Debido a la escasa distribución de C. isambertoi y a las amenazas existentes para su hábitat, como la presencia de cabras asilvestradas, la especie se considera en peligro crítico según los criterios y categorías de la UICN.

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