Blumea axillaris Dc.

Annual, erect, aromatic herb to 90 cm high. Vegetative parts glandular, sericeous, velutinous. Leaves sessile or basal ones petiolate or all petiolate; sessile leaves firmly textured, elliptic, lanceolate or oblanceolate, 10–80 mm long, 4–22 mm wide, irregularly serrate, dentate or rarely lobed, acute to obtuse, concolorous or slightly discolorous; petiolate leaves often thin-textured, ovate, elliptic, obovate or oblanceolate, 20–170 mm long, 4–70 mm wide, denticulate or irregularly serrate or dentate, acute, discolorous. Capitula 3.5–6 mm long, in open, contracted or spiciform panicles, usually with smaller panicles on axillary branches; involucral bracts glandular, villous, rarely glabrous with age; receptacle convex, glabrous or pilose. Florets pink or purple; corolla of disc florets 2.1–3.8 mm long, with lobes glandular, glabrous or pilose with simple or septate hairs or both. Achenes c. 1 mm long, not or faintly ribbed.

In Australia, associated with stream banks and seasonally flooded sites on a variety of soil types; on the heavy clay soils of the coastal floodplains it often occurs in dense colonies.