Trichodiadema pomeridianum ("Perde vygie") is a succulent plant of the genus Trichodiadema, widespread in the arid central Karoo regions of South Africa.

It grows as a loosely branching semi-erect shrublet up to 30 cm high.

The internodes are long, and rough from minute white papillae.

The petals are pink-to-purple in colour, and born in two series.

This species is easily confused with T. setuliferum, which however has much longer leaves (reaching 24mm).