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Asperula calabra (Rubiaceae) and allied taxa in southern Apennines, Italy
- Del Guacchio, E., Gargiulo, R., Caputo, P.
- Plant biosystems 2017 v.151 no.2 pp. 352-360
- Rubiaceae, altitude, mountains, phytogeography, plant morphology, Italy
- The present work is aimed at studying several Asperula (Rubiaceae) sect. Cynanchicae populations in southern Apennines, Italy, with particular reference to those referred to A. calabra , by employing biometrical methods on macromorphological data. Among other historical misapplications, A. cynanchica subsp. cynanchica seems to be very rare or missing in southern Italy. The enigmatic Asperula calabra , confirmed to be limited to a single mountain population in Calabria, appears to be strictly related to A. aristata subsp. scabra , so we suggest to treat it as a further subspecies of A. aristata . This latter species is otherwise distributed throughout southern Italy with subsp. scabra and subsp. aristata , characterised by slight morphological differences, which are correlated to altitudinal ranges.