Eriophyllum confertiflorum

(de Candolle) A. Gray

Proc. Amer. Acad. Arts 19: 25. 1883.

Common names: Golden or yellow yarrow
Illustrated
Basionym: Bahia confertiflora de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 657. 1836
Treatment appears in FNA Volume 21. Treatment on page 361. Mentioned on page 354, 360.

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.

Discussion

Varieties 2 (2 in the flora).

Key

1 Heads 10–30+ per array; peduncles 0–1(–2) cm; involucres 3–5 mm diam.; disc corollas 2–3 mm Eriophyllum confertiflorum 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 Eriophyllum confertiflorum var. tanacetiflorum
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +, glomerate +  and corymbiform +
indeterminate +  and determinate +
Dale E. Johnson +  and John S. Mooring +
(de Candolle) A. Gray +
decurrent +
Bahia confertiflora +
compound +  and simple +
cuneate;obovate +
0.5 cm5 mm <br />0.005 m <br /> (5 cm50 mm <br />0.05 m <br />) +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Golden or yellow yarrow +
yellow +  and white +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
glabrous +  and hairy +
papillate +
4(-5)-angled +, linear-clavate +  and prismatic flattened or 3-angled +
fertile +  and bisexual +
fertile +  and bisexual +
Calif. +  and Mexico +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
compound-corymbiform +, corymbiform +, discoid +  and radiate +
disciform +  and discoid +
in loose to tight +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
campanulate +
golden yellow +
1.5mm;3]mm +
sessile +  and petiolate +
papillate +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
2-carpellate +
persistent +
of 1 +  and 12+ aristate +
coroniform +
2.5 cm25 mm <br />0.025 m <br /> (9 cm90 mm <br />0.09 m <br />) +
0 cm0 mm <br />0 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
scarious-margined +
connate +  and distinct +
weakly +  and flat +
glabrous +, glabrate +, woolly +  and tomentose +
Proc. Amer. Acad. Arts +
pitted +  and smooth +
convex;conic +
mooring1994a +
2 +  and 14 +
cuneate +  and oblanceolate +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
exalbuminous +
Illustrated +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Undefined (tribe Undefined) subtribe Eriophyllinae +
Eriophyllum confertiflorum +
Eriophyllum +
species +
campanulate +
perennial +  and annual +