Sida calyxhymenia DC.
Tall Sida

Scientific Description

Herb or shrub, with hairy stems. Leaves 15-100 mm long, 3-15 mm wide, not lobed; margins entire; hairy, with stellate hairswith scales absent, Sessile glands absent; stipules present and persistent to older leaves or present but early deciduous (only visible on youngest leaves). Perianth clearly of two whorls (calyx and corolla), the corolla obvious and prominent. Pedicel present, 8-15 mm long; indumentum present, with stellate hairs present, with scales absent. Epicalyx (extra segments or 'bracteoles' immediately below the calyx) absent. Calyx green, 8-11 mm long, the lobes fused less than half their length, Sessile glands absent, simple hairs (without tubercle bases) absent, stellate hairs present, tubercle-based simple hairs absent, gland-tipped hairs absent, scales absent, Terminal appendages absent, number of ribs absent. Corolla yellow, 9-11 mm long, hairs or scales present, simple hairs (without tubercle bases) absent, stellate hairs present, tubercle-based simple hairs absent, gland-tipped hairs absent, scales absent. Indumentum (outside) Sessile glands absent. Stamens many, united and arising from a staminal tube around the style; filaments present, 2-2.7 mm long; anthers 0.6-0.7 mm long, indumentum absent (anthers glabrous). Staminodes absent, appendages absent. Ovary hairs and scales absent (ovary quite glabrous); style 1, 7-8 mm long, with five or numerous style branches or lobes, mostly glabrous, wing absent. Flowering time April, May, June, July, August, September or October. Distribution Botanical Province Eremaean or South-West, IBRA Bioregion Pilbara, Carnarvon, Gascoyne, Little Sandy Desert, Central Ranges, Yalgoo, Murchison, Coolgardie, Nullarbor, Geraldton Sandplains, Avon Wheatbelt, Mallee and Esperance.