Pelargonium gibbosum (l.) l'hér. Eckl. & Zeyh.

A low shrub up to 300 mm tall, or up to 1 m tall when scrambling over surrounding vegetation, well branched above ground level without an underground tuber, in nature deciduous during summer, unarmed. Stems smooth, semi-succulent, glabrous, internodes well-developed and up to 10 mm in diameter, nodes conspicuously swollen to diameter of up to 25 mm. Leaves pinnatilobate to pinnate, somewhat succulent, superficially glaucous out sparsely strigose or hispid on abaxial veins and ciliate on apices of segments, with microscopical short glandular hairs; lamina ovate-cordiform in outline, base cordate, apices of lobes rounded, 25-130 x 15-75 mm; petiole shorter than lamina: up to 65 mm long, deciduous; stipules narrowly ovate with apices acute, 5-12 x 2-4 mm, membranous, abaxially very densely strigose-and adaxially glabrous and conspicuously ciliate, deciduous. Inflorescence a peduncle of up to 120 mm long, carrying a many-flowered pseudo-umbel of flowers; flowers ±15 mm in diameter, almost regular. Pedicel inconspicuously short. Hypanthium 20-25 mm long, strigose and with densely crowded glandular hairs. Sepals narrowly ovate, abaxially densely strigose, yellow-green with hyaline margins, 6-9 x 1.5-2.0 mm. Petals 5, nearly similar, spathulate with rounded apices, pale greenish-yellow and mostly without markings; 9-13 x 4-6 mm. Stamens hardly exserted, 7 fertile, of three different lengths, filaments white, anthers 1.0-1.5 mm long, pollen pale yellow. Ovary ovoid, ±2.5 mm long and 2.0 mm in diameter, densely covered in apically directed hairs; style hardly exserted, 1.0-1.5 mm long; stigma orange yellow to reddish; mericarp base ±7 mm long, tail ±35 mm long. Flowering takes place at the onset of the dry season, stretching from November-March with a peak in December. A few stragglers may flower as late as April.