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Morphology, anatomy, and taxonomic position of Pagameopsis (Rubiaceae-Rubioideae)
Authors:Frederic Piesschaert  Steven Jansen  Ivan Jaimes  Elmar Robbrecht  Erik Smets
Affiliation:(1) Laboratory of Plant Systematics, Institute of Botany and Microbiology, Catholic University Leuven, Kasteelpark Arenberg 31, B-3001 Leuven, Belgium;(2) Present address: Institute for Nature Conservation, Kliniekstraat 25, B-1070 Brussels, Belgium;(3) National Botanic Garden of Belgium, Domein van Bouchout, B-1860 Meise, Belgium
Abstract:
Morphological and anatomical features (including wood anatomy and pollen morphology) of the small neotropical genusPagameopsis (Rubiaceae-Rubioideae) are discussed and illustrated. The fused ovaries, fenestrate corolla tube, basally attached anther filaments, and absence of raphides are especially noteworthy.Pagameopsis is definitely not a member of the Psychotrieae because of significant differences in wood anatomy and gynoecial and fruit structure. A close affinity with Gaertnereae seems doubtful for similar reasons. The taxonomic affinities ofPagameopsis remain obscure. The genus shows similarities with several taxa of the Rubioideae, such as Coccocypseleae, Morindeae, Hedyotideae, andMetabolos. The absence of raphides, on the other hand, makes a position in the Rubioideae doubtful.
Keywords:anatomy  morphology   Pagamea    Pagameopsis   Psychotrieae  Rubiaceae  taxonomy
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