It is a twining shrub or climber with narrowly elliptic leaves and pale blue flowers sometimes with dark blue spots or lines, arranged in branched clusters.

Marianthus coeruleopunctatus is a twining shrub or climber with silky-hairy new stems.

[2][3][4] Marianthus coeruleopunctatus was first formally described in 1840 by Johann Friedrich Klotzsch in Icones Plantarum Rariorum Horti Regii Botanici Berolinensis.

[7] Blue-spotted marianthus grows in woodland and forest near Perth, extending as far north as Mount Lesueur and as far east as Northam, in the Avon Wheatbelt, Geraldton Sandplains, Jarrah Forest and Swan Coastal Plain bioregions of south-western Western Australia.

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