A new species of Hymenostegia (Detarieae, Caesalpinioideae, Leguminosae) is described from Cameroon. Hymenostegia viridiflora has previously been confused with the type species of the genus, H. floribunda, but differs from it in having pale green to greenish yellow instead of lemon yellow petals, a broader upper part of the stipule, more numerous reddish veins on the white bracteoles and generally more numerous and narrower leaflets. As a consequence, the geographic range of true H. floribunda no longer includes Cameroon. Hymenostegia viridiflora is assessed as Vulnerable according to the criteria of IUCN.

Additional Metadata
Keywords Caesalpiniaceae, conservation, Fabaceae, taxonomy, threatened species, Tropical Africa
Journal Blumea: Biodiversity, Evolution and Biogeography of Plants
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Released under the CC-BY 4.0 ("Attribution") License

Citation
Mackinder, B.A, & Wieringa, J.J. (2013). Hymenostegia viridiflora (Detarieae, Caesalpinioideae, Leguminosae), a new tree species from Cameroon. Blumea: Biodiversity, Evolution and Biogeography of Plants, 58(1), 13–17.