Centaurea cyanus

Linnaeus

Sp. Pl. 2: 911. 1753.

Common names: Bachelor’s-button garden cornflower cornflower bluebottle bluebonnets blaver blue-poppy thimbles brushes corn pinks witch’s bells hurtsickle bleuet barbeau casse lunette
Introduced
Synonyms: Leucacantha cyanus (Linnaeus) Nieuwland & Lunell
Treatment appears in FNA Volume 19. Treatment on page 184. Mentioned on page 183.

Annuals, 20–100 cm. Stems usually 1, erect, ± openly branched distally, loosely tomentose. Leaves ± loosely gray-tomentose; basal leaf-blades linear-lanceolate, 3–10 cm, margins entire or with remote linear lobes, apices acute; cauline linear, usually not much smaller except among heads, usually entire. Heads radiant, in open, rounded or ± flat-topped cymiform arrays, pedunculate. Involucres campanulate, 12–16 mm. Phyllaries: bodies green, ovate (outer) to oblong (inner), tomentose or becoming glabrous, margins and erect appendages white to dark-brown or black, scarious, fringed with slender teeth ± 1 mm. Florets 25–35; corollas blue (white to purple), those of sterile florets raylike, enlarged, 20–25 mm, those of fertile florets 10–15 mm. Cypselae stramineous or pale blue, 4–5 mm, finely hairy; pappi of many unequal stiff bristles, 2–4 mm. 2n = 24 (Russia).


Phenology: Flowering spring–summer (May–Sep).
Habitat: Grasslands, woodlands, forests, roadsides, other disturbed sites
Elevation: 50–2400 m

Distribution

V19-206-distribution-map.gif

Introduced; Greenland, Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Yukon, Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., s Europe

Discussion

Centaurea cyanus is a commonly cultivated garden ornamental. Its cypselae are often included in wildflower seed mixes and it naturalizes readily in many areas.

Selected References

None.

Lower Taxa

None.

"fine" is not a number."fine" is not a number.

... more about "Centaurea cyanus"
with fine , 1-celled hairs +  and glabrous +
scarious +
white +  and dark-brown or black +
indeterminate +  and determinate +
David J. Keil +  and Jörg Ochsmann +
Linnaeus +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
linear-lanceolate +
decurrent +
Asteraceae tribe Cynareae +
compound +  and simple +
glabrous +  and tomentose +
10-nerved or 20-nerved +  and rugose +
ovate;oblong +
barbed +  and smooth +
Bachelor’s-button +, garden cornflower +, cornflower +, bluebottle +, bluebonnets +, blaver +, blue-poppy +, thimbles +, brushes +, corn pinks +, witch’s bells +, hurtsickle +, bleuet +, barbeau +  and casse lunette +
actinomorphic +
radial +  and bilateral +
white +  and blue pink purple or yellow +
inconspicuous +
expanded +  and slender +
pale blue +  and stramineous +
compressed +  and barrel--shaped +
fertile +  and bisexual +
Greenland +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Yukon +, Ala. +, Alaska +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +  and s Europe +
50–2400 m +
glandular-punctate +
puberulent +, strigose +, villous +, tomentose +  and glabrous +
pistillate +, staminate +  and neuter +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
fertile +  and sterile +
winged +  and beaked +
dispersed +
Grasslands, woodlands, forests, roadsides, other disturbed sites +
pedunculate +  and cymiform +
indeterminate +
flat-topped +  and rounded +
smaller +
each +  and sessile +
campanulate +
1.2 cm12 mm <br />0.012 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
gray-tomentose +
acute +  and linear-oblong +
with remote linear lobes +  and entire +
white +  and dark-brown or black +
2-carpellate +
persistent +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering spring–summer (May–Sep). +
papillate +  and smooth +
distinct +  and fused +
flat;convex +
exalbuminous +
1 cm10 mm <br />0.01 m <br /> (?) +
Introduced +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
Leucacantha cyanus +
Centaurea cyanus +
Centaurea +
species +
tomentose +  and glabrous +
20 cm200 mm <br />0.2 m <br /> (100 cm1,000 mm <br />1 m <br />) +
tree +, vine +, shrub +  and subshrub +
15 +, 13 +, 12 +, 11 +, 10 +, 9 +  and 8 +