Strychnos 1990 - 2004 - Crops for the Future

Author
Title
Year
Source title
Reference
Backlund, M., B. Oxelman and B. Bremer
Phylogenetic relationships within the Gentianales based on ndhf and rbcl sequenc
2000
American Journal of Botany
87(7): 1029-1043
Abstract
Phylogenetic relationships in the Gentianales with focus on Loganiaceae sensu late are evaluated
using parsimony analyses of nucleotide sequence data from the plastid genes rbcL and ndhF. Interand
intrafamilial relationships in the Gentianales. which consist of the families Apocynaceae
(including Asclepiadaceae), Gelsemiaceae, Gentianaceae, Loganiaceae, and Rubiaceae, are studied
and receive increased support from the combination of rbcL and ndhF data, which indicate that the
Family Rubiaceae forms the sister group to the successively nested Gentianaceae, Apocynaceae, and
Loganiaceae, all of which are well supported. The family Gelsemiaceae forms a distinct, supported
group sister to Apocynaceae. The Loganiaceae sensu stricto form a strongly supported group
consisting of 13 genera: Antonia, Bonyunia, Gardneria, Geniostoma, Labordia. Logania,
Mituasacme, Mirreola, Neuburgia, Norrisia, Spigelia, Strychnos, and Usteria. These genera form
two well-supported lineages. Several members of Loganiaceae sensu Leeuwenberg and Leenhouts,
i.e., Androya, Peltanthera, Plocosperma, Polypremum, and Sanango are clearly not members of the
Gentianales. The earlier exclusion of Buddlejaceae (including Buddleja, Emorya, Gomphostigma,
and Nicodemia) as well as the reclassification of the genera Nuxia and Retzia to Stilbaceae of the
L a m i a l e s a r e a l l w e l l s u p p o r t e d .