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The genus Calceolaria in NW South America VII. The section Zygophylla
Author(s) -
Molau Ulf
Publication year - 1981
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.1756-1051.1981.tb00715.x
Subject(s) - scrophulariaceae , biology , botany , introgression , inflorescence , sympatric speciation , genus , ecology , biochemistry , gene
Sect. Zygophylla of Calceolaria (Scrophulariaceae) in NW South America is revised. It is characterized by connate leaves with winged petioles, and most of the species have intercalary inflorescences. Fourteen species are recognized in the investigated area, one of which is described as new, viz. C. zamorana. Two new combinations are made, viz. C. nevadensis ssp. meridensis (Pennell) Molau and C. purpurascens (Kranzlin) Molau. The chromosome number 2n = 36 is reported for six of the species, viz. C. calycina, C. dilatata, C. grandiflora, C. lanata, C. lojensis , and C. trilobala. The species of sect. Zygophylla are completely interfertile, and sympatric species are isolated by external barriers, e.g. pollination and habitat ecology. Several cases of natural hybridization and introgression are reported.