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golden-yarrow, yellow-yarrow

Habit 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).

Peduncles

mostly 0–2.5(–9) cm.

Involucres

campanulate, 3–7 mm diam.

Ray florets

0 or 4–6(–8);

laminae golden yellow, 2–5 (× 1.5–3) mm.

Disc florets

10–75;

corollas 2–4 mm.

Phyllaries

4–7, distinct or connate at bases (broadly elliptic or ovate, carinate, apices obtuse or acute).

Heads

(3–)4–7(–10) or 10–30+ per array.

Cypselae

1.5–3.5 mm;

pappi of 2–14 cuneate to oblanceolate (subequal), erose scales 0.5–1.3 mm.

Eriophyllum confertiflorum

Distribution
from FNA
CA; Mexico
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Heads 10–30+ per array; peduncles 0–1(–2) cm; involucres 3–5 mm diam.; disc corollas 2–3 mm
var. confertiflorum
1. Heads (3–)4–7(–10) per array; peduncles 0–2.5(–9) cm; involucres 5–7 mm diam.; disc corollas 3.5–4 mm
var. tanacetiflorum
Source FNA vol. 21, p. 361.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Baeriinae > Eriophyllum
Sibling taxa
E. ambiguum, E. congdonii, E. jepsonii, E. lanatum, E. lanosum, E. latilobum, E. mohavense, E. multicaule, E. nubigenum, E. pringlei, E. staechadifolium, E. wallacei
Subordinate taxa
E. confertiflorum var. confertiflorum, E. confertiflorum var. tanacetiflorum
Synonyms Bahia confertiflora
Name authority (de Candolle) A. Gray: Proc. Amer. Acad. Arts 19: 25. (1883)
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