Atlas Florae Europaeae notes, 35. Further critical notes on Cytisus sect. Tubocytisus (Fabaceae) in Europe

Abstract

A few species names in Cytisus sect. Tubocytisus are re-assessed and taxonomically evaluated. Diagnostic characters are discussed and the species status of C. absinthioides Janka, C. eriocarpus Boiss., C. frivaldszkyanus Degen, C. jankae Velen. and C. smyrnaeus Boiss. is confirmed. The holotype of Cytisus triflorus Lam. was found to belong to C. hirsutus L. rather than to the C. ratisbonensis group as currently treated. Cytisus lasiosemius Boiss. is not the correct name for C. frivaldszkyanus Degen, but another synonym of C. hirsutus. Cytisus litwinowii V.I.Krecz., which was known solely from the holotype, is a synonym of C. austriacus L. s.str. Chamaecytisus pseudojankae Pifkó & Barina, reported from a small area shared between Albania, Greece and North Macedonia, is treated as a subalpine variant of C. austriacus. Cytisus tmoleus Boiss. is removed from the synonymy of C. eriocarpus and added to the synonymy of C. pygmaeus Willd. Cytisus falcatus subsp. albanicus Degen & Dörfl. and C. pubescens Gilib. are synonymised with C. hirsutus. Cytisus microphyllus Boiss. is moved from C. austriacus s.l. to the synonymy of C. frivaldszkyanus, and C. pindicola (Degen) Halácsy to the synonymy of C. jankae. Chamaecytisus calcareus (Velen.) Kuzmanov is accepted as Cytisus calcareus (Velen.) Sennikov & Val.N.Tikhom., comb. nov., and its distribution is circumscribed. Cytisus hirsutus var. ciliatus (Wahlenb.) Hazsl. and C. polytrichus var. subglabratus Val.N.Tikhom. & Sennikov, var. nov. are recognised as glabrous variants of the corresponding species. Lectotypes of C. ciliatus, C. hirsutissimus K.Koch, C. jankae, C. lasiosemius, C. pubescens, C. rhodopeus J.Wagner ex Bornm. and C. thirkeanus K.Koch are designated. Cytisus polytrichus is reported from the Western Caucasus in place of C. wulffii auct.