Sida calyxhymenia DC. Tall Sida
Prodr. 1:462 (1824)

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

Brief Description
Grazyna Paczkowska, Tuesday 24 September 1996

Erect slender or straggling shrub, 0.2-1.5(-2) m high. Fl. yellow, Apr to Oct. Red sandy & stony soils. Granite & limestone outcrops, creek beds, rocky hills.


Beard’s Provinces: Eremaean Province, South-West Province.

IBRA Regions: Avon Wheatbelt, Carnarvon, Central Ranges, Coolgardie, Esperance Plains, Gascoyne, Geraldton Sandplains, Great Victoria Desert, Little Sandy Desert, Mallee, Murchison, Nullarbor, Pilbara, Yalgoo.

IBRA Subregions: Avon Wheatbelt P1, Avon Wheatbelt P2, Cape Range, Carnegie, Central, Central band, Nullarbor Plain, Eastern Goldfield, Eastern Mallee, Eastern Murchison, Edel, Fitzgerald, Fortescue, Geraldton Hills, Hamersley, Mann-Musgrave Block, Northern band, Carlisle, Recherche, Rudall, Southern Cross, Tallering, Trainor, Western Murchison, Wooramel.

IMCRA Regions: Central West Coast, Shark Bay, Zuytdorp.

Local Government Areas (LGAs): Beverley, Bruce Rock, Carnarvon, Chapman Valley, Coolgardie, Cue, Dowerin, Dundas, East Pilbara, Esperance, Exmouth, Goomalling, Greater Geraldton, Kalgoorlie-Boulder, Kellerberrin, Laverton, Leonora, Meekatharra, Menzies, Merredin, Mingenew, Morawa, Mount Marshall, Mukinbudin, Murchison, Ngaanyatjarraku, Northampton, Nungarin, Perenjori, Quairading, Ravensthorpe, Sandstone, Shark Bay, Tammin, Westonia, Wiluna, Wongan-Ballidu, Yalgoo, Yilgarn, York.

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

Herb or shrub. Stems hairy. Leaves 15-100 mm long, 3-15 mm wide, not lobed; margins entire; indumentum present, with stellate hairs; 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. Epicalyx (extra segments or 'bracteoles' immediately below the calyx) absent. Calyx green, 8-11 mm long, the lobes fused less than half their length, stellate hairs present. Corolla yellow, 9-11 mm long, hairs or scales present, stellate hairs present. 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. Ovary hairs and scales absent (ovary quite glabrous); style 1, 7-8 mm long, with five or numerous style branches or lobes, mostly glabrous. 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 or Esperance.