Gnidia is a fascinating genus in the Thymelaeaceae (the mezereum family), made up of small shrubs and perennial herbs that often look deceptively simple until they flower. The genus is centred in Africa and Madagascar, with especially high diversity in southern Africa, and many species are local endemics adapted to very specific habitats from damp sandstone flats and marshy fynbos, to cold, rocky escarpments and renosterveld slopes. Despite their delicate appearance, Gnidia are tough, climate-smart plants: narrow leaves reduce moisture loss, and the flowers (technically colourful calyx lobes) can be incredibly showy in the veld, ranging from blues and pinks to yellows and creams.

Gnidia penicillata – Blue Paint Brush

Gnidia penicillata is one of the most enchanting little Cape shrublets you can grow from seed – dainty, fine-textured, and unexpectedly bright when it flowers. It is a South African endemic recorded from the Cape Peninsula to Caledon and the Swartberg, favouring marshy flats and lower slopes within sandstone fynbos vegetation types.

This species naturally forms a small clump of slender stems and narrow leaves, and it becomes especially striking in bloom. It forms a shrublet to about 40 cm, with opposite, narrow, hair-fringed leaves, and flowers that are unusually open for the genus – bright blue (often also pink forms), clustered at the branch tips, with spreading lobes and distinctive “petal-like” scales in the flower mouth.

Flowering can be wonderfully extended in season, with records from August through May, meaning a good plant can give colour across much of the Cape’s spring-and-summer window. For growers, that long flowering period makes it a rewarding choice for pots, rockery edges, naturalistic beds, and specialist indigenous gardens – especially where you can give it bright sun and a soil profile that stays lightly moist in the cooler season but never becomes stagnant.