Sida spinosa L. Spiny Sida
Sp.Pl. 2:683-684 (1753)

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

Brief Description
Grazyna Paczkowska, Wednesday 25 September 1996

Slender, upright or spreading shrub, 0.2-1 m high. Fl. yellow, Feb to Sep. Clay, sandy clay. Floodplains.


Beard’s Provinces: Eremaean Province, Northern Province.

IBRA Regions: Carnarvon, Central Kimberley, Dampierland, Northern Kimberley, Ord Victoria Plain, Pilbara, Victoria Bonaparte.

IBRA Subregions: Cape Range, Chichester, Fitzroy Trough, Fortescue, Hamersley, Hart, Mitchell, Ord, Ord-Victoria Plains P1, Pindanland, Roebourne, Victoria Bonaparte P1.

Local Government Areas (LGAs): Ashburton, Broome, Derby-West Kimberley, East Pilbara, Exmouth, Halls Creek, Karratha, Wyndham-East Kimberley.

Scientific Description
C. Hollister and K.R. Thiele, Wednesday 15 January 2020

Herb or shrub. Stems hairy. Leaves 20-75 mm long, 5-20 mm wide, not lobed; margins crenate or serrate; indumentum present; stipules present and persistent to older leaves, 10-17 mm long. Perianth clearly of two whorls (calyx and corolla), the corolla obvious and prominent. Pedicel present, 2-5 mm long; indumentum present, with stellate hairs. Epicalyx (extra segments or 'bracteoles' immediately below the calyx) absent. Calyx green, 5-8 mm long, the lobes fused less than half their length, stellate hairs present, number of ribs present, ten. Corolla yellow, 7 mm long, glabrous. Stamens many. Fruits hairs or scales present (?) or hairs and scales absent (?). Flowering time February, March, April, May, June, July, August or September. Distribution Botanical Province Northern or Eremaean, IBRA Bioregion Pilbara, Carnarvon, North Kimberley, Victoria Bonaparte, Central Kimberley, Dampierland or Ord-Victorian-Plain.