Anales del Jardín Botánico de Madrid, Vol 74, No 1 (2017)

Molecular and morphological data resurrect the long neglected Carex laxula (Cyperaceae) and expand its range in the western Mediterranean


https://doi.org/10.3989/ajbm.2438

Carmen Benítez-Benítez
Área de Botánica, Departamento de Biología Molecular e Ingeniería Bioquímica, Universidad Pablo de Olavide, Spain
orcid http://orcid.org/0000-0003-4956-0343

Mónica Míguez
Área de Botánica, Departamento de Biología Molecular e Ingeniería Bioquímica, Universidad Pablo de Olavide, Spain
orcid http://orcid.org/0000-0002-4321-2121

Pedro Jiménez-Mejías
New York Botanical Garden, United States
orcid http://orcid.org/0000-0003-2815-4477

Santiago Martín-Bravo
Área de Botánica, Departamento de Biología Molecular e Ingeniería Bioquímica, Universidad Pablo de Olavide, Spain
orcid http://orcid.org/0000-0003-0626-0770

Abstract


Carex sylvatica subsp. paui is a poorly studied taxon considered endemic from a few places in the western Mediterranean. It has been frequently misidentified as C. sylvatica subsp. sylvatica. To date, it has been reported only from the NE Iberian Peninsula and the NW Africa. We use molecular —nuclear ribosomal and plastid sequences— and morphological data to shed light on the taxonomic circumscription and distribution of this taxon, especially regarding its distinction from the type subspecies. The genetic data support the recognition of C. sylvatica subsp. paui as an independent taxon, and confirm new records from the Balearic and Tuscan archipelagos. It implies a considerable increase in its range and a new taxon for the Italian flora. Strikingly, the morphometric analyses revealed that the Sicilian type specimen ofC. laxula identifies this species with C. sylvatica subsp. paui. We consider that the taxon should be ranked at the species level. Based on the priority of the name C. laxula over C. paui, we subsume C. sylvatica subsp. paui in C. laxula. We also provide notes on the ecology of the species.

Keywords


Balearic archipelago, Carex sect. Sylvaticae, ITS, Mediterranean flora, taxonomy, Tyrrhenian, Tuscan archipelago, 5’trnK

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