TL;DR: The sclerophylly encountered across the Penaeaceae as a whole is likely to be related to paucity of soil nutrients rather than a response to water stress, and a number of taxa exhibit a trend towards amphistomatous, isobilateral leaves.
TL;DR: The leaf anatomy of species representing all seven genera of the Penaeaceae was studied by light and scanning electron microscopy, finding a trend towards amphistomatous, isobilateral leaves, generally associated with increased leaf thickness and amount of palisade mesophyll.
TL;DR: Close correspondence of the wood structure to habit and habitat is demonstrated, and Penaeaceae securely in Myrtales and help to define that order is demonstrated.
TL;DR: Olinia chimanimani T. Shah & I. Darbysh is described as a distinct species from the Chimanimani mountains in Mozambique and Zimbabwe based on morphological evidence and has been evaluated as Endangered using the IUCN Red List categories and criteria.
Abstract: Summary. Olinia chimanimani T. Shah & I. Darbysh. is described as a distinct species from the Chimanimani mountains in Mozambique and Zimbabwe, based on morphological evidence. It differs from other species of Olinia sect. Rochetiana in its smaller leaf size, sessile leaf attachment, glabrous flowers and galled flowers becoming narrowly swollen without prominent tubercles when infected. A species description, key and illustration, distribution map and ecological information are provided. The populations have been studied in the field, and it is only known from two locations. It is potentially under threat from burning due to human activity associated with illegal artisanal mining activity, and thus has been evaluated as Endangered (EN) using the IUCN Red List categories and criteria.