The flower of Pharnaceum aurantium has five spreading sepals, broadly elliptic with rounded or obtusely pointed tips. White on the inside and on the outside margins, the central parts on the outside of the sepals are brown. Pharnaceum flowers do not have petals. The sepals spread to a flower diameter of about 5 mm.

The five stamens alternate in a ring with the sepals. The five translucent filaments spread from around the base of the superior, green-brown ovary. The elongated, nearly globular anthers are whitish, their surfaces appearing granular.

The three large, white and fleshy stigmas appear sessile on the ovary that probably also has three locules (Vlok and Schutte-Vlok, 2010; Manning and Goldblatt, 1997; Bond and Goldblatt, 1984; Leistner, (Ed.), 2000; iNaturalist).