Comparative anatomy of young stems and leaves of 16 Dalbergia species (Fabaceae) from Madagascar and their taxonomic significance

Abstract

Rosewood and palisander belonging to Dalbergia (Fabaceae) are some of the most studied tree species in Madagascar. Dalbergia species can be identified based on morphological differences, mainly of flower and fruit, but are practically impossible to tell apart when these structures are missing. To support their sustainable management reliable identification of living Dalbergia is necessary prior to any exploitation. Studies of the vegetative anatomy of Dalbergia are lacking. This is the first report on young stems and leaves in endemic Dalbergia species. We studied 16 Dalbergia species from Madagascar using standard methods of anatomical investigation. Tissues and cells were examined, photographed, and comparisons were made among the taxa. Combinations of some characters can distinguish the species from one another, and six species (Dalbergia baronii, D. greveana, D. lemurica, D. purpurascens, D. razakamalalae, and D. urschii) can be distinguished by a single character. A microscopic leaf anatomical identification key for the 16 Dalbergia species is provided, which can help with the conservation and sustainable management of Dalbergia.

Citation

Ramanantsialonina, Ravo Nantenaina; Sandratriniaina, Ninah Andrianasolo; Rakouth, Bakolimalala; Wiemann, Michael C.; Ravaomanalina, Bako Harisoa. 2024. Comparative anatomy of young stems and leaves of 16 Dalbergia species (Fabaceae) from Madagascar and their taxonomic significance. Phytotaxa. 652(1): 33-46. https://doi.org/10.11646/phytotaxa.652.1.3.