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Systematics Of Malesian-Pacific Piper (Piperaceae), Rani Asmarayani
Systematics Of Malesian-Pacific Piper (Piperaceae), Rani Asmarayani
Dissertations
Comprised of ~2400 spp., Piper is a major clade in the magnoliid angiosperms. Three major groups are recognized in Piper, i.e., the Neotropical, Asian and South Pacific. Unlike Neotropical Piper,relationships in the Paleotropical Piper remain enigmatic. This study focused on the Paleotropical Piperwith emphasize on the Malesian-Pacific Piper, Malesia being the center of diversity of the genus in the Paleotropics. The goals are to evaluate relationships within Paleotropical Piper (chapter 1), to evaluate characters, morphological (chapter 1) and stem anatomical (chapter 2), that may distinguish clades, and to investigate the species boundaries focusing on the well-supported …
Systematics, Biogeography, And Species Delimitation Of The Malagasy Psorospermum (Hypericaceae), Heritiana S. Ranarivelo
Systematics, Biogeography, And Species Delimitation Of The Malagasy Psorospermum (Hypericaceae), Heritiana S. Ranarivelo
Dissertations
Psorospermum belongs to the tribe Vismieae (Hypericaceae). Morphologically, Psorospermum is very similar to Harungana, which also belongs to Vismieae along with another genus, Vismia. Interestingly, Harungana occurs in both Madagascar and mainland Africa, as does Psorospermum; Vismia occurs in both Africa and the New World. However, the phylogeny of the tribe and the relationship between the three genera are uncertain. Using freshly collected specimens from my fieldwork as well as extant herbarium specimens, I aimed first, to generate a phylogeny of Psorospermum; second, to investigate its biogeography; and third, to investigate species boundaries within Malagasy Psorospermum …