Centaurea stoebe subsp. micranthos

(S. G. Gmelin ex Gugler) Hayek

Repert. Spec. Nov. Regni Veg. Beih. 30(2): 766. 1931.

Common names: Spotted knapweed centaurée maculée ou tachetée
IntroducedIllustrated
Basionym: Centaurea maculosa subsp. micranthos S. G. Gmelin ex Gugler Ann. Hist.-Nat. Mus. Natl. Hung. 6: 167. 1908
Synonyms: Centaurea biebersteinii de Candolle
Treatment appears in FNA Volume 19. Treatment on page 189. Mentioned on page 194.

Perennials, 30–150 cm. Stems usually many, loosely gray-tomentose, branches ascending. Leaves loosely gray-tomentose or becoming glabrous, resin-gland-dotted; basal and proximal cauline petiolate, blades 10–15 cm, margins 1–2 times divided into linear or oblong segments; mid and distal cauline smaller, entire or dissected. Heads usually many in open cymiform arrays, pedunculate. Involucres ovoid, 10–13 mm. Phyllaries: bodies pale green or pink tinged, ovate (outer) to oblong (inner), with several prominent parallel veins, glabrous or finely tomentose, erect appendages decurrent on distal phyllary margins, dark-brown or black, scarious, fringed with slender teeth. Florets 30–40; corollas pink to purple (white), those of sterile florets 15–25 mm, slender or somewhat enlarged, those of fertile florets 12–15 mm. Cypselae whitish or pale-brown, 3–3.5 mm, finely hairy; pappi in 1–2 series, of many white, unequal, stiff bristles to 5 mm. 2n = 36.


Phenology: Flowering summer (Jun–Sep).
Habitat: Roadsides, fields, open forests
Elevation: 50–2800 m

Distribution

V19-217-distribution-map.gif

Introduced; Alta., B.C., N.B., N.S., Ont., Que., Ala., Ariz., Ark., Calif., Colo., Conn., Del., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Oreg., Pa., R.I., S.C., S.Dak., Tenn., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., Europe

Discussion

Selected References

None.

Lower Taxa

None.

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

with fine , 1-celled hairs +  and glabrous +
scarious +
black +  and dark-brown +
fringed +  and decurrent +
cymiform +  and open +
indeterminate +  and determinate +
David J. Keil +  and Jörg Ochsmann +
(S. G. Gmelin ex Gugler) Hayek +
decurrent +
Centaurea maculosa subsp. micranthos +
compound +  and simple +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
pink tinged +  and pale green +
tomentose +  and glabrous +
10-nerved or 20-nerved +  and rugose +
ovate;oblong +
barbed +  and smooth +
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Spotted knapweed +  and centaurée maculée ou tachetée +
actinomorphic +
radial +  and bilateral +
white +  and blue pink purple or yellow +
inconspicuous +
expanded +  and slender +
pale-brown +  and whitish +
compressed +  and barrel--shaped +
fertile +  and bisexual +
Alta. +, B.C. +, N.B. +, N.S. +, Ont. +, Que. +, Ala. +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +  and Europe +
50–2800 m +
glandular-punctate +
puberulent +, strigose +, villous +, tomentose +  and glabrous +
pistillate +, staminate +  and neuter +
pink +  and purple +
enlarged +  and slender +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
fertile +  and sterile +
winged +  and beaked +
dispersed +
Roadsides, fields, open forests +
pedunculate +
disciform +  and discoid +
in corymbiform arrays +, singly +  and radiant +
indeterminate +
each +  and sessile +
1 cm10 mm <br />0.01 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
resin-gland-dotted +, glabrous +  and gray-tomentose +
acute +  and linear-oblong +
entire +  and dentate +
cauline +  and mid +
dissected +  and entire +
smaller +
1-2 times divided into linear or oblong segments +
2-carpellate +
persistent +
Flowering summer (Jun–Sep). +
papillate +  and smooth +
distinct +  and fused +
Repert. Spec. Nov. Regni Veg. Beih. +
flat;convex +
exalbuminous +
Introduced +  and Illustrated +
branched +  and simple +
spreading +, ascending +  and erect +
appendaged +  and truncate +
dilated +  and swollen +
enlarged +
Centaurea biebersteinii +
Centaurea stoebe subsp. micranthos +
Centaurea stoebe +
subspecies +
tomentose +  and glabrous +
30 cm300 mm <br />0.3 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
tree +, vine +, shrub +  and subshrub +
15 +, 13 +, 12 +, 11 +, 10 +, 9 +  and 8 +