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Revisión del género Trichocline (Compositae)

ELSA MATILDE ZARDINI
Darwiniana
T. 19, No. 2/4 (Mayo 1975), pp. 618-733
Stable URL: http://www.jstor.org/stable/23215562
Page Count: 116
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Revisión del género Trichocline (Compositae)
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Abstract

Revision of the genus Trichocline (Compositae). The genus Trichocline belongs to the family of the Compositae, tribe Mutisieae, and it includes 22 species, most of them from South America, and only one from Australia. In South America the genus is distributed in two geographical areas, both with the same number of species: the Andean area extending through Bolivia, Chile and W of Argentina and the south brazilian area extending through the south of Brazil, Paraguay, Uruguay and NE of Argentina. Three species grow in the northern or central part of Argentina. The genus is divided into three sections: Nervifolium, with one species, Amblysperma, with two species and Trichocline, with 19 species. The author considers that the most primitive section is Nervifolium, and in the section Trichocline which includes most of the species, the most primitive species are those which grow in the south brazilian area. The pollen of this genus has been studied and the chromosome number of three species has been determined. All the species are described and illustrated. The following new taxa or combinations are proposed: Trichocline spathulata (Phil.) nov. comb., Trichocline auriculata var. breviscapa nov. var., Chaptalia denticulata (Bak.) nov. comb., and Chaptalia martii (Bak.) nov. comb. A number of synonyms is proposed, all of them based on the study of the respective nomenclatural types.

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