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Sida sp. Carnarvon (P.S. Short 2492)

Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status

Erect shrub, to 1.5 m high. Fl. yellow, Aug to Sep. Red sand dunes.

Amanda Spooner, Descriptive Catalogue, 22 September 1997

Scientific Description

Herb or shrub, with hairy stems. Leaves 17-65 mm long, 7-30 mm wide, not lobed; margins sinuate; hairy, with stellate hairswith scales absent, Sessile glands absent; stipules present and persistent to older leaves, 10-25 mm long. Perianth clearly of two whorls (calyx and corolla), the corolla obvious and prominent. Pedicel present, 7-10 mm long; indumentum present, with stellate hairs present, with scales absent. Epicalyx (extra segments or 'bracteoles' immediately below the calyx) absent, Sessile glands absent. Calyx green, 12-20 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, 10-13 mm long, glabrous. Indumentum (outside) Sessile glands absent. Stamens many, united and arising from a staminal tube around the style; filaments present, 2 mm long; anthers 0.8 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 August or September. Distribution Botanical Province Eremaean, IBRA Bioregion Carnarvon and Gascoyne.

C. Hollister and K.R. Thiele, 11 August 2023


IBRA Regions
Carnarvon, Gascoyne.
IBRA Subregions
Augustus, Wooramel.
Local Government Areas (LGAs)
Carnarvon, Upper Gascoyne.