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The Western Australian Herbarium’s collections management system, WAHerb, and DBCA’s flora taxonomic names application, WACensus, have been set to read-only mode since 1 October 2025. Recent taxonomic changes are not currently being reflected in Florabase, herbarium collections, or the census. Due to the rapidly approaching holiday season and associated agency and facility soft closures, along with the substantial work involved in data mapping, cleaning, and verification, the migration to the new collection management software is not expected to occur before 1 March 2026, when a further update will be provided. Please reach out to us if you have any questions or concerns.

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Radyera Bullock

Reference
Kew Bull. p454 (1957)
Name Status
Current

Scientific Description

Family Malvaceae.

Tribe Hisbisceae.

Habit and leaf form. Shrubs (with a stellate-tomentose indumentum). Plants unarmed. To 0.5–1.5 m high. Mesophytic and xerophytic. Leaves alternate; spiral; non-sheathing; simple. Leaf blades dorsiventral; entire, or dissected (sometimes shallowly-lobed); ovate, or orbicular (mostly cordate); cordate. Mature leaf blades adaxially woolly; abaxially woolly. Leaves with stipules (with paired stipular nectaries in R. farragei). Leaf blade margins crenate. Leaf anatomy. Hairs present; complex hairs present. Complex hairs stellate.

Reproductive type, pollination. Fertile flowers hermaphrodite. Unisexual flowers absent. Plants hermaphrodite. Entomophilous.

Inflorescence and flower features. Flowers aggregated in ‘inflorescences’; in panicles. Inflorescences axillary. Flowers pedicellate; medium-sized; regular; 5 merous; tetracyclic. Hypogynous disk absent. Perianth with distinct calyx and corolla; 10; 2 -whorled; isomerous. Calyx present; 5; 1 -whorled; gamosepalous; lobed; lobulate (5-lobed); hairy; valvate; exceeded by the corolla; regular. Calyx lobes triangular. Epicalyx present (of basally connate bracteoles). Corolla present; 5; 1 -whorled; polypetalous (adnate to the base of the staminal column); hairy abaxially; purple (i.e. lavender to purplish). Androecium present. Androecial members indefinite in number. Androecium 50–100 (i.e. ‘many’). Androecial members adnate; all equal; coherent (connate; the filaments fused in a column surrounding the style); 1 - adelphous (the tube attached to the petals); 1 -whorled. Androecium exclusively of fertile stamens (or rather, half-stamens, each having only a half anther). Stamens 50–100. Anthers dehiscing via longitudinal slits; introrse; unilocular. Pollen grains spinulose. Gynoecium 5 carpelled. The pistil 5 celled. Gynoecium syncarpous; eu-syncarpous; superior. Ovary plurilocular; 5 locular. Gynoecium stylate. Styles 1; simple; apical. Stigmas 1 (cushion-like); 5 - lobed; capitate. Placentation axile.

Fruit and seed features. Fruit non-fleshy; hairy; dehiscent; a capsule. Capsules septicidal (to some degree), or loculicidal (by 10 valves). Dispersal unit the seed. Seeds endospermic (copious); not compressed (ellipsoid); not conspicuously hairy. Embryo other than straight, curved, bent or coiled (flat).

Geography, cytology, number of species. World distribution: South Africa and Australia. Native of Australia. Not endemic to Australia. Australian states and territories: Western Australia, South Australia, Northern Territory, New South Wales, and Victoria. South-West Botanical Province. N=18 for R. faragei. A genus of 2 species; 1 species in Western Australia; 0 endemic to Western Australia.