Centipeda Lour.

Involucral bracts with scarious margins, acute, in 2 rows Centipeda
Inner bisexual florets 0.3–0.4 mm long. Heads 3–4 mm diam., sessile or on short axillary peduncles; 10–20 bisexual florets per head. Leaves oblanceolate to oblong-cuneate, petiolate, 5–15 mm long. Cypselas c. 1 mm long, 0.3 mm wide; area between ribs flat or convex. Aromatic annual, glabrous pubescent or woolly, with usually prostrate stems up to 20 cm long. Widespread. Usually in wet places. Fl. summer. Spreading Sneeze Weed Centipeda minimaminima