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golden-yarrow, yellow-yarrow

Wallace eriophyllum, Wallace's woolly daisy, woolly daisy, woolly easterbonnets

Habit Shrubs, 20–50(–100) cm. Annuals, 1–15 cm.
Stems

erect (woolly).

erect to spreading or ascending.

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).

blades obovate to spatulate, 7–20 mm, sometimes 3-lobed, ultimate margins entire, plane (apices ± rounded), faces ± woolly.

Peduncles

mostly 0–2.5(–9) cm.

1–3 cm.

Involucres

campanulate, 3–7 mm diam.

broadly campanulate, 4–6 mm diam.

Ray florets

0 or 4–6(–8);

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

5–10;

laminae usually cream or yellow, sometimes white with red veins, 3–4 mm.

Disc florets

10–75;

corollas 2–4 mm.

20–30;

corollas 2–3 mm (tubes cylindric, throats funnelform, gradually dilated, lobes glandular; anther appendages subulate, not glandular).

Phyllaries

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

5–10, distinct.

Heads

(3–)4–7(–10) or 10–30+ per array.

usually borne singly.

Cypselae

1.5–3.5 mm;

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

± 2 mm;

pappi usually of 6–10 ± oblong scales 0.4–0.8 mm, rarely 0.

2n

= 10 + 0–1 I or 0–3 B.

Eriophyllum confertiflorum

Eriophyllum wallacei

Phenology Flowering Dec–Jul.
Habitat Sandy or gravelly openings, creosote-bush or sagebrush scrublands, Joshua Tree or pinyon-juniper woodlands, or chaparral
Elevation 30–2400 m (100–7900 ft)
Distribution
from FNA
CA; Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; NV; UT; Mexico (Baja California)
[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. FNA vol. 21, p. 356.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Baeriinae > Eriophyllum 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
E. ambiguum, E. confertiflorum, E. congdonii, E. jepsonii, E. lanatum, E. lanosum, E. latilobum, E. mohavense, E. multicaule, E. nubigenum, E. pringlei, E. staechadifolium
Subordinate taxa
E. confertiflorum var. confertiflorum, E. confertiflorum var. tanacetiflorum
Synonyms Bahia confertiflora Bahia wallacei, Antheropeas wallacei, E. wallacei var. rubellum
Name authority (de Candolle) A. Gray: Proc. Amer. Acad. Arts 19: 25. (1883) (A. Gray) A. Gray: Proc. Amer. Acad. Arts 19: 25. (1883)
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