A taxonomic study of Lotus australis complex (Leguminosae), with special emphasis on plants from Pacific Ocean islandsстатья
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Аннотация:The genus Lotus comprises about 140 species and has major centres of diversity
in the Mediterranean Region and in Macaronesia. The Lotus australis
complex, however, is confined to Australia and some islands of Pacific Ocean.
The present morphological study recognises four species of the complex,
namely L. australis Andrews s.str. (Australia, Tasmania), L. pacificus Kramina
& D.D. Sokoloff, sp. nov. (Ryukyu Is., Japan; Lanyu Is., Taiwan), L. anfractuosus
(Bak.f.) Kramina & D.D. Sokoloff, comb. et stat. nov. (Loyalty Is. and
Île des Pins, New Caledonia; Aniwa Is., Vanuatu), and L. cruentus Court
(Australia). Two new varieties are described: Lotus anfractuosus var. vanuatensis
Kramina & D.D. Sokoloff, var. nov. and Lotus australis var. austroglaber
Kramina & D.D. Sokoloff, var. nov. Disjunctive distribution of the L. australis
complex could be explained by long distance dispersal rather than by
vicariance. L. australis and L. cruentus, if compared to Mediterranean and
Macaronesian species, possess many presumably plesiomorphic character
states. However, we do not consider this fact as an indication of Australian
origin of the genus Lotus.