Gould, K. R. and L. Struwe. 2004. Phylogeny and biogeography of Symbolanthus (Gentianaceae-Helieae) in the Guayana Highlands and Andes, based on ribosomal 5S-NTS sequences and morphology. Annals of the Missouri Botanical Garden
91: 438-446.
Struwe, L. and K. R. Gould. 2004. Redefinition of Symbolanthus to include Wurdackanthus (Gentianaceae-Helieae). Novon 14: 354-359.
Gould, K. R. and M. J. Donoghue. 2000. Phylogeny and biogeography of Triosteum (Caprifoliaceae). Harvard Papers in Botany 5: 157-166.
Gould, K. R. and R. K. Jansen. 1999. Taxonomy, phylogeny, and the origin of a Gulf Coast disjunction in the Coelostylis species complex of Spigelia. Lundellia 2: 1-13.
Gould, K. R. 1999. Three new species of Spigelia (Strychnaceae) from Mexico. Brittonia 51: 407-414.
Gould, K. 1996. A New, Disjunct Variety of Spigelia gentianoides from Bibb Co., Alabama. Sida 17: 417-421.
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Struwe, L. and K. R. Gould. 2004. Redefinition of Symbolanthus to include Wurdackanthus (Gentianaceae-Helieae). Novon 14: 354-359.
Gould, K. R. and M. J. Donoghue. 2000. Phylogeny and biogeography of Triosteum (Caprifoliaceae). Harvard Papers in Botany 5: 157-166.
Gould, K. R. and R. K. Jansen. 1999. Taxonomy, phylogeny, and the origin of a Gulf Coast disjunction in the Coelostylis species complex of Spigelia. Lundellia 2: 1-13.
Gould, K. R. 1999. Three new species of Spigelia (Strychnaceae) from Mexico. Brittonia 51: 407-414.
Gould, K. 1996. A New, Disjunct Variety of Spigelia gentianoides from Bibb Co., Alabama. Sida 17: 417-421.
Return to Mathews' home page