Sempervivum druentianum (Crassulaceae subfam. Sempervivoideae), a new endemic species discovered in the Durance Valley (Dép. Hautes-Alpes, Region Provence-Alpes-Côte d’Azur, France), and description of a new nothospecies
DOI:
https://doi.org/10.3989/collectbot.2024.v43.0004Keywords:
France, S. arachnoideum, S. druentianum, S. ×brigantiacum, S. gr. tectorum, taxonomyAbstract
A new species of Sempervivum was discovered in southern France and is here named Sempervivum druentianum. This new species, which has habitus like that of S. tectorum, is mainly characterised by leaves that are always covered with glandular trichomes and carpels that are glandular on the back. To date, only one population is known, but true or alleged hybrids with other Sempervivum species have been discovered in the surroundings of the type locality of S. druentianum; one of these, S. ×brigantiacum (= S. arachnoideum × S. druentianum), is also present and described here. A key to all taxa belonging to the S. tectorum L. group located in southern France is provided.
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