Sirdavidia
Small tree or shrubs with reticulate venation. Inflorescences one to three flowered, axillary on old branches or at base on trunk, with one to three short sympodial rachilla with numerous basal bracts and a longer flowering pedicel with a single bearing bract at the base or proximal to the middle. Flowers androdiecous, sepals 3, free, valvate, petals three in two whorls, free, valvate, outer and inner petals subequal in length, spreading horizontally or reflexed at anthesis. Stamens 16-19, connectives tongue shaped, yellow. Carpel one, densely pubescent, stigma cylindrical coiled, ovules 7, uniseriate. Monocarp sessile, cylindrical densely pubescent.
This genus is sister to Mwasumbia, in the tribe Piptostigmateae, subfamily Malmeoideae.
Sirdavidia is endemic to Gabon. It is found in the Monts de Cristal (two collections) area and the Ivindo National Park (one collection).
The genus grows in understory rain forests, on well drained soils.