Citation: Gay ex DC., Prod. 1:462 (1824).

Synonymy: S. petrophila F. Muell., Linnaea 25:381 (1853); S. calyxhymenia Gay ex DC. var. ferruginea E. Pritzel in Diels & Pritzel, Bot. Jb. 35:362 (1904).

Common name: Tall (or rock) sida.

Description:
Erect shrub often c. 1 m high but up to 2 m, stellate-tomentose, greyish often tinged yellowish; leaf blades 2.5-6 times longer than the petiole, linear-oblong or -lanceolate to oblong, 15-60 x 4-30 mm, cuneate to subcordate at the base, bluntly serrate to serrulate with 3-12 teeth/ cm, densely persistently stellate-tomentose.

Flowers solitary or in apparent axillary or terminal clusters of 2-6 through association with developing shoots, on often articulated peduncles 7-20 mm long; calyx herbaceous or especially in fruit scarious, greatly enlarging up to anthesis when 5-12 mm long, appressed-pubescent often with dark hairs, with lobes more than three-quarters of its length, ovate-triangular, acute to shortly acuminate, spreading under the fruit; corolla 7-12 mm long, yellow.

Schizocarp transverse-ellipsoid, 5-7 mm diam., prominently grooved between the carpels; carpels glabrous or pubescent, persistently so or quickly glabrescent, wrinkled on the circumference, convex or acute apically, the 5-7 mericarps wrinkled on their sides.

	Sida calyxhymenia leaf, fruit and mericarp.
Image source: fig 440b in Jessop J.P. & Toelken H.R. (Ed.) 1986. Flora of South Australia (4th edn).

Published illustration: Cunningham et al. (1982) Plants of western New South Wales, p. 491.

Distribution:  Especially common in rocky places. S.Aust.: NW, LE, NU, GT, EP.   W.Aust.; N.T.; Qld; N.S.W. Conservation status: native Flowering time: mainly April — Oct.

SA Distribution Map based on current data relating to specimens held in the State Herbarium of South Australia

Biology: No text

Author: Not yet available