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 ± similar, densely woolly
Heads 2–3 mm diam. Heads initially in a cylindrical uninterrupted Inflorescence, the main axis obscured by heads at least distally. Involucre bracts in 3–4 rows apices broadly acute, not tinged with purple. Introd. from S. America Gamochaeta antillana
Heads 3–3.5 mm diam. Heads in an interrupted inflorescences the main axis visible from the terminal head down. Involucre bracts in 5–7 rows, apices sharply acute, commonly tinged with purple. Leaves narrow-elliptic to spathulate, up to 3 cm long and 8 mm wide. Erect to procumbent herb up to 20 cm high. Coast. Weed of cultivation and waste places. Introd. from S. America. Fl. spring–summer Gamochaeta calviceps