26 research outputs found
Discovery of a second population of the Critically Endangered Madagascan suicide palm <i>Tahina spectabilis</i>
No full textDiscovery of a second population of the Critically Endangered Madagascan suicide palm Tahina spectabilis
No full textNo abstract available
Tahina spectabilis: an Exciting New Discovery in Madagascar Ten Years On
No full textA decade after the extraordinary hapaxanthic Coryphoid palm was discovered on a remote peninsula in northwest Madagascar, a team from Kew revisited the site to see how successful conservation activities have been and were able to confirm a stunning discovery back on the mainland
Figure 2 from: Xu Z, Tian J, Rapanarivo SHJV, Letsara R, Rakotonasolo RA, Onjalalaina GE, Hu G-W, Wang Q-F (2020) Hydrostachys flabellifera (Hydrostachyaceae), a new species from Madagascar. PhytoKeys 167: 45-56. https://doi.org/10.3897/phytokeys.167.58538
No full textFigure 2 Hydrostachys flabellifera G.W. Hu, Zhun Xu & Q.F. Wang A habit B emergences on rachis, cross-section C, D emergences E dorsal view of male bract F ventral view of male bract G top view of stamen
Figure 1 from: Xu Z, Tian J, Rapanarivo SHJV, Letsara R, Rakotonasolo RA, Onjalalaina GE, Hu G-W, Wang Q-F (2020) Hydrostachys flabellifera (Hydrostachyaceae), a new species from Madagascar. PhytoKeys 167: 45-56. https://doi.org/10.3897/phytokeys.167.58538
No full textFigure 1 Hydrostachys flabellifera G.W. Hu, Zhun Xu & Q.F. Wang. A habit B lateral view of stipule and petiole base C ventral view of stipule and petiole base D, E part of the leaf F downside of a leaf emergence G upperside of a leaf emergence H dorsal view of male bract I ventral view of male bract J, K stamen. Drawn by Jing Tian
Four New Species of Anisotes (Acanthaceae) from Madagascar
No full textVolume: 22Start Page: 396End Page: 40
Biome conservatism prevailed in repeated longdistance colonization of Madagascars mountains by Helichrysum Compositae Gnaphalieae
No full textAcute Toxicity Evaluation of the Malagasy Endemic Aloe helenae and A. analavelonensis in Mice
No full textPopulation modelling and genetics of a critically endangered Madagascan palm Tahina spectabilis
No full textA new phylogenetic framework for the genus Kalanchoe (Crassulaceae) and implications for infrageneric classification
No full textBackground and Aims: Kalanchoe is a diverse genus in the Crassulaceae, with centres of diversity in Madagascar and sub-Saharan Africa. The genus is known for its popularity in horticulture, its use as a model system for research on CAM photosynthesis and vegetative reproduction, its high invasive potential and its use in traditional medicine. The genus-rank circumscription and infrageneric classification of Kalanchoe have been the subject of debate for centuries, especially regarding the status and rank of what is now treated as K. subg. Bryophyllum and K. subg. Kitchingia. We aim to generate a densely sampled phylogeny of Kalanchoe s.l. and evaluate the current infrageneric classification system. Methods: We inferred a phylogenetic tree for Kalanchoe using a ddRAD sequencing approach, covering 70 % of taxa and four out of five subgenera currently recognized in the genus. Key Results: We recovered four well-supported clades, partially corresponding to the current subgeneric classification. Kalanchoe subg. Calophygia resolves as sister to the rest of the genus. The relationships among the three remaining clades, however, receive less support. The predominantly mainland African K. subg. Kalanchoe forms a strongly supported clade that resolves as sister to K. subg. Bryophyllum. These two clades are together sister to a clade containing mainly species from K. subg. Kitchingia and K. sect. Pubescentes. Conclusions: The current subgeneric classification of Kalanchoe is partially backed up by our phylogenetic tree but requires further refinement. The tree topology suggests a Malagasy origin of the genus and one dispersal event to the African mainland, with subsequent dispersal from continental Africa to the Arabian Peninsula and Southeast Asia. The formation of bulbils on the leaf margin is restricted to a larger clade within K. subg. Bryophyllum and thus only evolved once. Our tree provides a framework for further taxonomic, evolutionary and physiological research on the genus.Peer Reviewe
