Medicosma riparia (P.Royen) T.G.Hartley
Hartley, T.G. (1985) Australian Journal of Botany 33: 41.
Occasionally grows into a small tree but usually flowers and fruits as a shrub.
Pedicels nil or very short, up to 1 mm long. Sepals about 4 mm long, apices obtuse. Petals about 20-25 mm long, densely stellate hairy or stellate scaly on the outer surface. Stamens four, about 18-20 mm long alternating with four staminodes which are slightly larger. Anther filaments hairy. Style about 25 mm long, clothed in simple and stellate hairs.
Cotyledons elliptic, about 12 x 5 mm, apex truncate, base cuneate to attenuate, margins crenate, petioles very short or absent. Oil dots visible mainly near the margins. First pair of leaves obovate, margins crenate in the upper half. Oil dots visible with a lens. At the tenth leaf stage: leaf blade obovate, apex retuse, base attenuate, margin with a few crenate teeth towards the apex. Lateral veins forming loops inside the blade margin. Midrib raised on the upper surface. Leaves aromatic when crushed. Stems with 2 longitudinal ridges running down from the point of attachment of each petiole. Seed germination time 166 days.