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Sida sp. Barlee Range (S. van Leeuwen 1642)

Conservation Code
Priority Four
Naturalised Status
Native to Western Australia
Name Status

Spreading shrub, to 0.5 m high. Fl. yellow, Aug. Skeletal red soils pockets. Steep slope.

Amanda Spooner, Descriptive Catalogue, 22 September 1997

Scientific Description

Herb or shrub, with hairy stems. Leaves 10-30 mm long, 6-20 mm wide, not lobed; margins crenate or sinuate; hairy, with stellate hairswith scales absent, Sessile glands absent; stipules present and persistent to older leaves. Perianth clearly of two whorls (calyx and corolla), the corolla obvious and prominent. Pedicel present, 15-25 mm long; indumentum present, with stellate hairs present, with scales absent. Epicalyx (extra segments or 'bracteoles' immediately below the calyx) absent. Calyx green, 6.5-8.5 mm long, the lobes fused half or more of 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, 8-11 mm long, glabrous. Indumentum (outside) Sessile glands absent. Stamens many, united and arising from a staminal tube around the style; filaments present, 0.6-2 mm long; anthers 0.3-0.7 mm long, indumentum absent (anthers glabrous). Staminodes absent, appendages absent. Ovary hairs and scales absent (ovary quite glabrous); style 1, 4.5-7.5 mm long, with five 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 or scales present, simple hairs (without tubercle bases) absent, stellate hairs present, Sessile glands absent, tubercle-based simple hairs absent, gland-tipped hairs absent, scales absent; apex rounded; terminal awns or spines absent; calyx persistent to mature fruit, not accrescent; carpels 7-8; seeds per loculus 1. Flowering time August. Distribution Botanical Province Eremaean, IBRA Bioregion Pilbara and Gascoyne. Conservation Code Priority Three (P3).

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


IBRA Regions
Gascoyne, Pilbara.
IBRA Subregions
Ashburton, Augustus, Hamersley.
Local Government Areas (LGAs)
Ashburton, East Pilbara, Meekatharra.