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Revision of the southeast Asian genus Trivalvaria (Annonaceae)
Author(s) -
Heusden E. C. H.
Publication year - 1997
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/j.1756-1051.1997.tb00306.x
Subject(s) - annonaceae , sepal , biology , petal , botany , genus , southeast asia , ovule , taxonomy (biology) , stamen , pollen , history , ancient history
The number of species in Trivalvaria is reduced from eight to four. A new variety of T. macrophylla from North Sumatra is described. Two Polyalthia species, P. nemoralis and P. oligogyna, found in Laos, North Vietnam, and Hainan, are brought into the synonymy of Z dubia. The genus further ranges from NE India and the Andarnan Islands to Java and Borneo. It is distinguished from other Asian Annonaceae by the characteristic venation of the leaves, the imbricate sepals and petals, and the single basal ovule.