Citation: Bullock Kew Bull. 1956:454 (1957).

Derivation: After Dr R. A. Dyer, a South African twentieth century botanist.

Synonymy: Allenia E. Phillips, Jl. S. Afr. Bot. 10:33 (1944), nom. illegit. 2 species, 1 in South Africa and 1 in Australia. The differences between Radyera and Hibiscus are discussed by Fryxell & Hashmi (1971) Bot. Gaz. 132:57-62.

Common name: None

Description:
Perennial softly woody shrubs, densely stellate-tomentose; leaves sometimes shallowly lobed, toothed.

Flowers bisexual, pedicellate, in few-flowered pedunculate axillary clusters or more numerous in terminal clusters, showy; epicalyx of 8-10 connate segments; sepals fused to form a campanulate tube with 5 lobes; petals 5, large and brightly coloured; staminal tube long and narrow; carpels 5, in a single whorl; stigmas 5, forming a subcapitate group at the apex of the simple style; ovules few in each carpel.

Fruit a subglobular 5-celled capsule enclosed in the persistent calyx, dehiscing loculicidally at first but eventually also septicidally; seeds black, angled, with a glabrous wrinkled testa.

Biology: No text

Author: Not yet available