Ammobium alatum

Perennial or facultative annual, erect, white-woolly herb 60–100 cm high; stems usually much branched, prominently winged. Basal leaves petiolate, narrow-lanceolate to spathulate, 10–30 cm long, 5–15 mm wide, acute to acuminate, base attenuate and sometimes more or less hastate; cauline leaves few, bract-like, 2–8 cm long, sessile. Capitula 10–20 mm diam.; involucral bracts 5–10 mm long, white, margins irregular, usually longer than florets; receptacle scales oblong to oblanceolate, herbaceous initially, becoming hardened and rigid, blackish-brown, with an irregular truncate apex and prominent mucro. Florets bright yellow; corolla c. 5 mm long. Cypselas linear, 2.5–4 mm long, rugose, dark brown; cup of pappus c. 0.5 mm long, awns to 1 mm long. Flowers mainly Nov.–Apr.