01491naa a2200145 a 450000100080000000500110000800800410001910000180006024500990007826000090017752010360018665300240122265300140124677300850126012910202025-07-04       1982    bl uuuu     u00u1 u    #d1 aROHWER, J. G.  aA taxonomic revision of the genera Seguieria Loeff. And Gallesia Casar.h[electronic resource]  c1982  aThe study of the complete collections of the genera Seguteria and Gallesta from 19 American and European herbaria has led to the recognition of a largely continuous pattern of variation in each genus. Therefore in the Seguteria number of accepted species is drastically reduced, from 16 in the most recent revision (NOWICKE 1968) to only six, of which three are highly polymorphic. Two additional correlated diagnostic characters (structure of the seed coat and indumentum) are introduced, which strongly plead against the sectional division proposed by WALTER (1909). Furthermore the real identity of the type species, S. americana L., which has long been misinterpreted, is eludicated, and the reduction of S, aculeata Jacq. to S. americana L. by Linnaeus himself is shown to have been erroncous. This brings about nomenclatural changes in the most widespread and most frequent species. Since Gallesia has already been treated as being monotypic by NOWICKE, only a minor change, the reduction of var. ovata is made in this genus.  aRevião taxonômica  aSeguieria  tMitteilungen der Botanischen Staatssammlung München, 18, p. 231-238, dez. 1982.