Golden or yellow yarrow

Bahia confertiflora de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 657. 1836

Shrubs, 20–50(–100) cm. Stems erect (woolly). Leaves (proximal usually mostly alternate): blades cuneate to obovate, 0.5–5 cm (the longer 1–2-pinnately lobed, lobes linear, the shorter 3–5-lobed or -toothed), ultimate margins entire, revolute, abaxial faces woolly, adaxial usually glabrate (distal leaves gradually reduced in size and lobing). Heads (3–)4–7(–10) or 10–30+ per array. Peduncles mostly 0–2.5(–9) cm. Involucres campanulate, 3–7 mm diam. Phyllaries 4–7, distinct or connate at bases (broadly elliptic or ovate, carinate, apices obtuse or acute). Ray florets 0 or 4–6(–8); laminae golden yellow, 2–5 (× 1.5–3) mm. Disc florets 10–75; corollas 2–4 mm. Cypselae 1.5–3.5 mm; pappi of 2–14 cuneate to oblanceolate (subequal), erose scales 0.5–1.3 mm.

Varieties 2 (2 in the flora): California, Mexico.

SELECTED REFERENCE

Mooring, J. S. 1994. A cytogenetic study of Eriophyllum confertiflorum (Compositae, Helenieae). Amer. J. Bot. 81: 919–926.