Three New Species of Impatiens (Balsaminaceae) from the Eastern Arc Mountains of Tanzania

Nora Gavin-Smyth; Andrea Bianchi; Roy E. Gereau

doi:10.3417/20251012

Nora Gavin-Smyth Northwestern University and Negaunee Institute, Chicago Botanic Garden https://orcid.org/0000-0001-7227-1342
Andrea Bianchi Muse – Museo delle Scienze and PAMS Foundation https://orcid.org/0000-0002-7756-2066
Roy E. Gereau Missouri Botanical Garden

DOI: https://doi.org/10.3417/20251012

Keywords: Eastern Arc, Impatiens, new species, Tanzania, taxonomy

Abstract

We describe and illustrate three newly identified species of Impatiens Riv. ex L. (Balsaminaceae): I. maridadi Gavin-Smyth from Tanzania’s Uluguru Mountains, I. damuyamzee Gavin-Smyth & A. Bianchi from the Udzungwa Mountains, and I. kidude Gavin-Smyth & A. Bianchi from the Nguru Mountains. We compare the new species with other Impatiens species sharing similar morphology in the region. All three new species are endemic to the biologically important Eastern Arc Mountains of Kenya and Tanzania.