Range-wide differential adaptation and genomic offset in critically endangered Asian rosewoods.

In the billion-dollar global illegal wildlife trade, rosewoods have been the world's most trafficked wild product since 2005. and are the most sought-after rosewoods in the Greater Mekong Subregion. They are exposed to significant genetic risks and the lack of knowledge on their adaptability limits the effectiveness of conservation efforts.

Chemovariation and antibacterial activity of extracts and isolated compounds from species of and (Ixoroideae, Rubiaceae).

Background: A large number of secondary metabolites can be obtained from plants used for traditional medicine in two related genera ( and ) in the subfamily Ixoroideae (Rubiaceae), but there are only a few detailed studies on their bioactivities. Therefore, the main goals of this study were to determine the antibacterial activities of lipophilic extracts from plants of some and species native to Thailand, and to isolate some pure compounds from those extracts. Moreover, we compared the occurrence of compounds in different plant parts of samples from different habitats to better understand their variation.

Lithocarpus orbicarpus (Fagaceae), a new species of Stone Oak from Phang Nga province, Thailand.

A new species is described, Lithocarpus orbicarpus Strijk, collected from Ton Pariwat Wildlife Sanctuary, Mueang district, Phang Nga Province in the Peninsular Floristic Region of Thailand. We provide the first technical illustrations and colour photographs of the new species, as well as a description of its conservation status and the collecting locality. The species can be easily distinguished by its unique orbicular acorns, each covered with a dense pattern of irregularly placed scales, which completely conceal the nut, except for a tiny apical pore, and which are arranged in a dense cluster on an erect woody spike.