The flowers of Pelargonium longicaule are borne in clusters of up to six on long stalks from leaf axils near branch tips.
The pale pink, cream or white flowers have two large oval upper petals and three small, oblong to obovate lower ones. In picture, the three orange anthers appear granular from their pollen, while the five-branched stigma is maroon coloured, as are the line markings or nectar guides at the base of the upper petals.
Flowering happens from late winter to midsummer. The photo was taken in August.
The specific name, longicaule, is derived from the Latin words longus meaning long and caulis meaning stem, referring to the long flower stalks (Manning, 2007; Manning and Goldblatt, 1996; Bond and Goldblatt, 1984; Andrew, 2017; iNaturalist; www.fernkloof.org.za).