Abstract
A new diploid (2n = 30) species, Rhaponticoides calabrica, is described from Calabria and Basilicata (southern Italy). This species differs from the closely related R. centaurium – an endemic of Apulia and northern Basilicata – by different flower colour (white in the former, purplish in the latter), width of membranous margin of phyllaries (1.8 ± 0.4 mm vs 0.8 ± 0.3 mm) and pappus length (6.8 ± 0.9 mm vs 9.1 ± 1.0 mm). The two species are completely allopatric and seem to have also different chromosome numbers.
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The authors wish to thank the curators of Herbarium of Calabria University (CLU) and Herbarium Centrale Italicum (FI) herbaria for their kind help.
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Appendix 1 Studied specimens of Rhaponticoides centaurium
Appendix 1 Studied specimens of Rhaponticoides centaurium
Italy, Apulia: Valle Fratta presso il Lago S. Giovanni, nei boschi lungo il...., 28 May 1893, Martelli (FI); Italia austral. Apulia: Gargano in sylvis Vallis Fratta sol. calcar. 8-1000, 4 Jul 1875, Porta et Rigo (FI); Laterza (Taranto), 25 May 1985, Bianco, Medagli et D’Emerico (FI); Valle Fratta presso il Lago S. Giovanni, 28 Jun 1893, Martelli (FI); Basilicata: Salandra (Basilicata), nei querceti della montagnola, 450–550 m, 20 May 1920, Lacaita (FI); Vulture a Femminamorta - Basilicata reg. submont., 10 Jun 1898, Fiori (FI); Unknown provenance: C. centaurium Linn., da Corinati (?) in Aug 1842 (FI); Unknown provenance (likely Gargano): Herb. Clifford: 421, Centaurea 7 (BM, n. 000647256).
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Puntillo, D., Peruzzi, L. A New Species of Rhaponticoides (Asteraceae) from Southern Italy. Folia Geobot 44, 191–197 (2009). https://doi.org/10.1007/s12224-009-9037-x
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DOI: https://doi.org/10.1007/s12224-009-9037-x