Robuta

https://www.koeltz.com/en/revision-of-neosprucea-salicaceae-2008-systematicbotany-monographs-85-23-figs-62-p-gr8vo-paper-bd Koeltz Botanical Books. Revision of Neosprucea (Salicaceae). 2008. (Systematic Botany Monographs,... systematic botany monographs botanical books revision neosprucea