Cryptandra congesta is a flowering plant in the family Rhamnaceae and is endemic to a restricted area of the south-west of Western Australia. It is a low, spreading shrub with narrowly egg-shaped or narrowly oblong leaves and clusters of white, tube-shaped flowers.
Cryptandra congesta is a spreading shrub that typically grows to a height of, its young stems covered with simple hairs. The leaves are narrowly egg-shaped to narrowly elliptic, long and wide, on a petiole long. The upper surface of the leaves is glabrous and there are minute teeth on the edges, especially near the tips. The flowers are borne in groups of 5 to 12 on the ends of short side-shoots in head-like groups wide. The floral tube is long and joined at the base for . The sepals are long and densely hairy near the tip, but otherwise glabrous. Flowering occurs from April to October.[1]
Cryptandra congesta was first formally described in 1995 by Barbara Lynette Rye and the description was published in the journal Nuytsia.[2] The specific epithet (congesta ) means "crowded", referring to the flowers.[3]
This cryptandra grows on granite, but is only known from a small area north of Denmark in the Jarrah Forest bioregion of south-western Western Australia.[4]
This cryptandra is listed as "Priority Four" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions, meaning that it is rare or near threatened.[5]