Pygmaeothamnus

Suffrutices with stems arising from a woody rhizome. Stipules triangular, usually caudate. Leaves opposite or (in ours) mostly in whorls of 3-4. Flowers axillary, in cymes or fascicles, sometimes borne at lower leafless nodes. Calyx limb-tube ± obsolete; lobes 5, erect. Corolla: tube cylindric; lobes valvate, reflexed about equal in length to the tube. Ovary 2-locular; with 1 pendulous ovule 1 per loculus. Pollen presenter deeply 2-lobed. Fruit spherical or pyriform containing 2 pyrenes.

Pygmaeothamnus is a monotypic genus of flowering plants in the family Rubiaceae. It was described by Walter Robyns in 1928 and originally held four species. It is found in central and southern Africa.