Subshrublike herbs erect, many branched, to 40 cm tall. Stem and branchlets stellate pilose or subglabrous. Stipules filiform, ca. 6 mm, stellate pilose; petiole 6-20 mm, sparsely stellate pilose; leaf blade ovate, 1.4-4 × 0.6-2.2 cm, abaxially stellate pilose, adaxially subglabrous or sparsely stellate pilose, base cordate. Flower solitary or nearly fascicled, axillary. Pedicel 4-7 mm, sparsely stellate pilose, articulate near apex. Calyx campanulate, ca. 4 mm, stellate pilose. Corolla yellow, ca. 8 mm in diam.; petals obovate-lanceolate. Filament tube sparsely strigose. Mericarps 5, with vertical grooves, densely stellate pilose, apically 2-awned.

Sida cordifolioides is very similar to S. cordifolia Linnaeus, but differs by the uniformly stellate pilose stems and fruits with five mericarps. Sida cordifolia has stems with prominent simple hairs as well as stellate hairs and fruits with 10 mericarps.

● Hunan (Yongshun).