Two pine tree species, distinctive of Calabria’s mountain landscape, were studied karyologically. The karyotypes of the two species, 2n = 24, differ both in their morphology and particularly in the number of secondary constrictions occurring: 14 in Pinus laricio Poir. and 6 in P. leucodermis Antoine. Systematic individuality of the latter from P. heldreichii Christ is confirmed. Separation of P. laricio from P. nigra Arnold is proposed. A new taxonomic conspectus is presented for Calabrian P. laricio: Pinus laricio subsp. calabrica (Loud.) Cesca et Peruzzi comb. et stat. nov.
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Cesca et al. (2002) studied this question.
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