Sida hookeriana Miq.

Scientific Description

Herb or shrub, with glabrous stems. Leaves 35-95 mm long, 15-60 mm wide, palmately lobed, simply (once-)lobed or complexly (twice-)lobed; margins serrate; hairy, with stellate hairs, with tubercle-based simple hairs tubercle-based simple hairswith scales absent, Sessile glands absent; stipules present and persistent to older leaves, 15-25 mm long. Perianth clearly of two whorls (calyx and corolla), the corolla obvious and prominent. Pedicel present, 11-16 mm long; indumentum present, with simple hairs, with stellate hairs present, with scales absent. Epicalyx (extra segments or 'bracteoles' immediately below the calyx) absent. Calyx green, 5-9 mm long, the lobes fused less than half their length, Sessile glands absent, simple hairs (without tubercle bases) present, stellate hairs present, tubercle-based simple hairs absent, gland-tipped hairs absent, scales absent, Terminal appendages absent, number of ribs absent. Corolla yellow or white, 6-9 mm long, glabrous, scales absent. Stamens many, united and arising from a staminal tube around the style; filaments present, 0.2-0.3 mm long; anthers 0.2-0.3 mm long, indumentum absent (anthers glabrous). Staminodes absent, appendages absent. Ovary hairs and scales absent (ovary quite glabrous); style 1, 3.8-4 mm long, with four or numerous style branches or lobes, mostly glabrous, wing absent. Fruits indehiscent and splitting into sections (schizocarps), length-width ratio more or less as long as wide, mericarps wrinkled, hairs and scales absent; apex rounded; prickles absent (except perhaps a terminal awn); terminal awns or spines absent; calyx persistent to mature fruit, accrescent. Flowering time September, October, November or December. Distribution Botanical Province South-West, IBRA Bioregion Geraldton Sandplains, Swan Coastal Plain, Jarrah Forest, Warren and Esperance.