It is a twining shrub or climber with elliptic leaves and white flowers arranged in groups of twenty to thirty and becoming fawn or pink as they age.

Marianthus candidus is a twining shrub or climber with warty stems that are silky-hairy at first, but become glabrous as they age.

The five petals are 12–22 mm (0.47–0.87 in) long, white, fading to fawn or pink and joined at the base to form a short tube with spatula-shaped, spreading lobes.

[2][3][4][5][6] Marianthus candidus was first formally described in 1837 by Stephan Endlicher in Enumeratio plantarum quas in Novae Hollandiae ora austro-occidentali ad fluvium Cygnorum et in sinu Regis Georgii collegit Carolus Liber Baro de Hügel from an unpublished descripiption by Charles von Hügel of a plant he collected in the Swan River Colony.

[2][3][5][10] Marianthus candidus is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.