Pelargonium spinosum Willd.

Much-branched, spiny aromatic subshrub. Stems subsucculent, erect, bark of older stems peeling off in paper-like strips. Leaves simple, subsucculent, glabrous but with glandular hairs, dimorphous; large leaves unifoliolate, lamina reniform, margin dentate, petiole much longer than lamina, persistent to form hard spines when lamina is shed; small leaves simple, petiole short and deciduous; stipules persistent to form thorns. Pseudo-umbels 3-10-flowered. Pedicel as long as or longer than hypanthium. Petals 5, white to light pink, posterior two with purple featherlike markings and slightly larger than anterior three. Fertile stamens 7.