Achillea nobilis

Linnaeus

Sp. Pl. 2: 899. 1753.

Common names: Noble yarrow
Treatment appears in FNA Volume 19. Treatment on page 494. Mentioned on page 492.

Perennials, (10–) 15–60 cm (taprooted). Stems 1 (–4), erect, simple, glabrous or sparsely tomentose. Leaves sessile; blades ovate, 1.5–3 cm × 10–15 mm, 1–2-pinnately lobed, (bases auriculate, slightly clasping) faces ± hairy. Heads 30–100+, in simple or compound, corymbiform arrays. Phyllaries 10–13+ in (1–) 2 series, (midribs light green) oblong (apices papillose, translucent), abaxial faces glabrous. Receptacles flat to slightly convex; paleae narrowly oblong, 2–2.5 mm. Ray-florets 8–10 (–13), pistillate, fertile; corollas white, laminae 1–1.5 × 2–2.5 mm. Disc-florets 10–25+; corollas grayish white, 1.5–2.5 mm. Cypselae 0.75–1 mm. 2n = 18, 27.


Phenology: Flowering mid Jul–early Sep.
Habitat: Pastures, disturbed roadsides
Elevation: 900–1500 m

Distribution

V19-823-distribution-map.gif

Introduced; Mont., Europe

Discussion

Achillea nobilis was introduced in the flora area through cultivation. It has been reported in Minnesota, Massachusetts, and New York; herbarium sheets indicate that those reports were based on cultivated specimens. It was first collected in Montana in 1902; it appears to have become established in that state, where it is known from Lake and Flathead counties.

Selected References

None.

Lower Taxa

None.

... more about "Achillea nobilis"
glabrate +  and sparsely tomentose +
not tailed +  and obtuse +
unequal +
scarious +
corymbiform +, compound +  and simple +
indeterminate +  and determinate +
Debra K. Trock +
Linnaeus +
decurrent +
compound +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
lobed;ovate +
10mm;15mm +
Noble yarrow +
zygomorphic +, actinomorphic +  and (3-)5-merous +
grayish white +  and white +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
winged +  and monomorphic +
oblong +  and obovate +
fertile +  and bisexual +
fertile +  and bisexual +
Mont. +  and Europe +
900–1500 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Pastures, disturbed roadsides +
in subcapitate clusters +  and singly +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
campanulate;hemispheric +
1mm;1.5mm +
orbiculate +  and suborbiculate +
2mm;2.5mm +
cauline +  and basal +
deltate +
entire +  and dentate +
unequal +
2-carpellate +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
membranous +
persistent +
Flowering mid Jul–early Sep. +
10 +  and 13 +
subequal +  and unequal +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
exalbuminous +
1 (?) +  and 4 (?) +
appendaged +  and truncate +
papillate +
Compositae +
Achillea nobilis +
Achillea +
species +
campanulate +
flattened +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
15 cm150 mm <br />0.15 m <br /> (60 cm600 mm <br />0.6 m <br />) +
shrub +  and subshrub +