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Sida sp. spiciform panicles (E. Leyland s.n. 14/8/90)

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

Spindly shrub, 0.4-2 m high. Fl. yellow, Aug to Sep. Red-brown clay. Hillsides, river valleys.

Helen Coleman, Descriptive Catalogue, 9 April 1998
Image

Scientific Description

Herb or shrub, with hairy stems. Leaves 15-70 mm long, 5-25 mm wide, not lobed; margins sinuate or serrate; hairy, with stellate hairswith scales absent, Sessile glands absent; stipules present and persistent to older leaves, 6-9 mm long. Perianth clearly of two whorls (calyx and corolla), the corolla obvious and prominent. Pedicel present, 6-8 mm long; indumentum present, with stellate hairs present, with scales absent. Epicalyx (extra segments or 'bracteoles' immediately below the calyx) absent. Calyx green, 4.5-7 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, 4.5 mm long, glabrous. Indumentum (outside) Sessile glands absent. Stamens many, united and arising from a staminal tube around the style; filaments present, 0.6-1.5 mm long; anthers 0.4-0.6 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, 3-5.5 mm long, with four 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; prickles absent (except perhaps a terminal awn); terminal awns or spines absent; calyx persistent to mature fruit, not accrescent; carpels 5; seeds per loculus 1. Flowering time August or September. Distribution Botanical Province Eremaean, IBRA Bioregion Pilbara, Carnarvon, Gascoyne, Little Sandy Desert, Murchison and Coolgardie.

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

Distribution

IBRA Regions
Carnarvon, Gascoyne, Little Sandy Desert, Murchison, Pilbara.
IBRA Subregions
Ashburton, Augustus, Cape Range, Carnegie, Chichester, Eastern Murchison, Fortescue, Hamersley, Roebourne, Rudall, Western Murchison, Wooramel.
Local Government Areas (LGAs)
Ashburton, Carnarvon, East Pilbara, Exmouth, Karratha, Meekatharra, Menzies, Murchison, Sandstone, Wiluna, Yalgoo.