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New names and combinations in cosmos asteraceae coreopsideae

New names and combinations in cosmos asteraceae coreopsideae

Phytologia 69(3): 189-199

A newly discovered white to pale pink rayed Cosmos "intercedenslike" tetraploid from Jalisco, Mexico is described as a variety of the yellow rayed Cosmos landii Sherff (C. landii var. achalconensis var. nov.). A large headed, previously named, tetraploid race of C. diversifolius Otto, found to the south of Mexico City is reduced to varietal rank as C. diversifolius var. dahlioides comb. nov. Cosmos stellatus Sherff is treated as a geographically isolated variety of C. sessilis Sherff (C. sessilis var. stellatus comb. nov.); and the Jalisco endemic, C. diversifolius var. deficiens Sherff is elevated to species status (C. deficiens comb. nov.). Illustrations and discussions relating to these proposals are presented.

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