Gamochaeta Wedd.
Cypsela with globose hairs. Involucre bracts with firm ± leathery tips. Leaves, stems and heads with tangled appressed hairs. Robust, erect or prostate herbs Gamochaeta
Leaf surfaces contrasting in colour and/or hairiness
Heads not hidden amongst woolly hairs.
Midrib of leaf similar in colour to the surface. Basal leaves spathulate to obovate, 10–12 cm long, 8–20 mm wide. Heads in axillary clusters in a dense spike-like panicle. Involucre 1.5–3 mm diam.; bracts straw-coloured, scarious, hyaline towards the tip. Erect herb up to 40 cm high. Sydney district. Disturbed sites. Introd. from Central and S. America. Fl. spring–summer Gamochaeta purpurea
Leaves with distinctly paler usually furrowed midrib on the upper surface, oblanceolate to spathulate, up to 7 cm long and 15 mm wide. Heads in axillary clusters in a dense spike-like panicle. Involucre 2–3 mm diam.; bracts scarious towards the top purplish. Annual or short-lived perennial herb up to 50 cm high. Widespread. Weed of cultivation and waste places. Introd. from America. Fl. summer. Purple Cudweed Gamochaeta coarctata