Malvastrum A. Gray 1849: Re-evaluation of the generic limits of Malvastrum, required the transfer of several species which no longer fitted the prescription. As M. lacteum and M. subtriflorum differed in morphological, cytological and ecological characteristics, they wereplaced together in the new genus Kearnemalvastrum.
Robust, short-lived, soft-wooded shrubs, exceeding 1m in height. Leaves commonly 3-5-7-lobed. Flowers in many-branched, large, paniculate inflorescences. Epicalyx of 3 inconspicuous bracts. Calyx campanulate, 5 lobed, 3 or 5 costae.Corolla white, lobes very flat and open. Staminal column filamentous at apex. Flowers open in early morning, style branches extended, recurved by late afternoon (to allow cross-pollination first with self-pollinaton as a backup). Fruits schizocarpic, mericarps black, glabrous, smooth-walled with rounded edges and unarmed, single-seeded, seeds glabrous. Endoglossum absent.