Presentation on theme: "1 Laboratory of Plant Systematics, K.U.Leuven, Belgium; 2 Institute of Systematic Botany, University of Zurich, Zollikerstrasse 107, 8008 Zürich, Switzerland;"— Presentation transcript:
1 Laboratory of Plant Systematics, K.U.Leuven, Belgium; 2 Institute of Systematic Botany, University of Zurich, Zollikerstrasse 107, 8008 Zürich, Switzerland; 3 Nationaal Herbarium Nederland, Leiden branch, The Netherlands ; 4 Jodrell Laboratory, Royal Botanic Gardens Kew, Richmond, Surrey TW9 3DS, United Kingdom A search for phylogenetically informative wood characters in the subfamily Rauvolfioideae (Apocynaceae) Frederic Lens 1, Mary E. Endress 2, Pieter Baas 3, Steven Jansen 4 and Erik Smets 1,3
Ca. 1000 spp., 84 genera, 10 tribes Small to medium-sized trees, tropical lowland forests Lianas in 24 genera, most diverse in Willughbeieae Uniform flower morphology –Traditional classifications based on seed and fruit characters INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION Plumeria rubra Catharanthus roseusVinca minor
Rauvolfioideae wood anatomically diverse Typical wood characters for most tribes –Vessel grouping, vessel element length –Number of cells per axial parenchyma strand –Fibre type Climbing vs. nonclimbing anatomy: –Paratracheal vs. apotracheal parenchyma –Tracheid presence vs. absence Some wood characters are diagnostic at the family level –E.g. Baileyan trend for vessel element length INTRODUCTION OBJECTIVES RESULTS DISCUSSION CONCLUSION
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