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Sida hackettiana W.Fitzg.

J.& Proc.Roy.Soc.Western Australia 3:171 (1918)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status

Rounded shrub, 0.4-1.5 m high. Fl. yellow, Mar to Jun. Stony plains.

Grazyna Paczkowska, Descriptive Catalogue, 24 September 1996

Scientific Description

Herb or shrub, with hairy stems. Leaves 15-105 mm long, 5-40 mm wide, not lobed; margins entire; hairy, with Simple hairs (without tubercle bases), with stellate hairswith scales absent, Sessile glands absent; stipules present but early deciduous (only visible on youngest leaves), 18 mm long. Perianth clearly of two whorls (calyx and corolla), the corolla obvious and prominent. Pedicel present, 2 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, 4-4.5 mm long, the lobes fused half or more of their length or 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, 5-6 mm long, hairs or scales present, simple hairs (without tubercle bases) present, 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, 1.4-1.5 mm long; anthers 0.3-0.4 mm long, indumentum absent (anthers glabrous). Staminodes absent, appendages absent. Ovary hairs or scales present, simple hairs absent, stellate hairs present, gland-tipped hairs absent; style 1, 4-4.5 mm long, with five or numerous style branches or lobes, mostly glabrous, wing absent. Flowering time March, April, May or June. Distribution Botanical Province Northern, IBRA Bioregion Central Kimberley and Dampierland.

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


IBRA Regions
Central Kimberley, Dampierland, Ord Victoria Plain.
IBRA Subregions
Fitzroy Trough, Mount Eliza, Pentecost, Pindanland, Purnululu.
IMCRA Regions
Local Government Areas (LGAs)
Broome, Derby-West Kimberley, Halls Creek.