Helenium autumnale

Linnaeus

Sp. Pl. 2: 886. 1753.

Common names: Common sneezeweed hélénie automnale
IllustratedEndemic
Synonyms: Helenium autumnale var. canaliculatum (Lamarck) Torrey & A. Gray Helenium autumnale var. fylesii B. Boivin Helenium autumnale var. grandiflorum Torrey & A. Gray Helenium autumnale var. montanum (Nuttall) Fernald Helenium autumnale var. parviflorum (Nuttall) Fernald Helenium latifolium Helenium parviflorum
Treatment appears in FNA Volume 21. Treatment on page 431. Mentioned on page 427.

Perennials, 50–130 cm. Stems 1 (–7), branched distally, strongly winged, sparsely to densely hairy proximally, moderately to densely hairy distally. Leaves usually moderately to densely hairy, sometimes glabrous; basal blades (withered by flowering) lanceolate, oblanceolate, or obovate, entire or weakly lobed; proximal and mid-blades obovate to oblanceolate, usually dentate or entire; distal blades oblanceolate to lanceolate, entire or dentate. Heads 5–70 (–100+) per plant, in paniculiform arrays. Peduncles 3–10 cm, moderately to densely hairy. Involucres globoid, 8–20 × 8–23 mm. Phyllaries (connate proximally) moderately to densely hairy. Ray-florets 8–21, pistillate, fertile; corollas yellow, 10–23 × 4–10 mm. Disc-florets 200–400 (–800+); corollas yellow proximally, yellow to yellowbrown distally, 2.4–4 mm, lobes 5. Cypselae 1–2 mm, sparsely to moderately hairy; pappi of 5–7 entire, aristate scales (0.5–) 0.9–1.5 (–1.8) mm. 2n = 32, 34, 36.


Phenology: Flowering (Jul–)Aug–Oct(–Nov).
Habitat: Roadsides, fields, along streams, ditches, seepage areas, around ponds and lakes
Elevation: 20–2600 m

Distribution

V21-1076-distribution-map.gif

Alta., B.C., Man., N.W.T., Ont., Que., Sask., Ala., Ariz., Ark., Calif., Colo., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Md., Mass., Mich., Miss., Mo., Mont., Nebr., Nev., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., S.C., Tenn., Tex., Utah, Va., Wash., W.Va., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Helenium autumnale"
36 +, 34 +  and 32 +
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +
indeterminate +  and determinate +
Mark W. Bierner +
Linnaeus +
lobed +, entire +, obovate +, oblanceolate +  and lanceolate +
decurrent +
compound +  and simple +
pinnatifid;lobed;spatulate;ovate;spatulate;ovate;oblong;oblanceolate;linear;lanceolate;elliptic +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Common sneezeweed +  and hélénie automnale +
yellow +  and yellowbrown +
1 cm10 mm <br />0.01 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
4-5-angled +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Alta. +, B.C. +, Man. +, N.W.T. +, Ont. +, Que. +, Sask. +, Ala. +, Ariz. +, Ark. +, Calif. +, Colo. +, Del. +, D.C. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Md. +, Mass. +, Mich. +, Miss. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, S.C. +, Tenn. +, Tex. +, Utah +, Va. +, Wash. +, W.Va. +  and Wyo. +
20–2600 m +
gland-dotted +
glabrous or +  and sparsely densely hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Roadsides, fields, along streams, ditches, seepage areas, around ponds and lakes +
discoid +  and radiate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (3.4 cm34 mm <br />0.034 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
ovoid;obconic;ovoid;obconic;hemispheric;globose +
0.8 cm8 mm <br />0.008 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
sessile +  and petiolate +
glabrous +  and hairy +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
connate +  and distinct +
ovate +, oblong +, oblanceolate +, linear +, lanceolate +  and elliptic +
unequal +  and subequal +
2-carpellate +
persistent +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Flowering (Jul–)Aug–Oct(–Nov). +
9 +  and 34 +
bearing subulate enations +, hairy +  and bristly +
ovoid;hemispheric;ovoid;hemispheric;globose;conic +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
5 +  and 7 +
aristate +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
exalbuminous +
Illustrated +  and Endemic +
winged +  and branched +
1 (?) +  and 7 (?) +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Helenium autumnale var. canaliculatum +, Helenium autumnale var. fylesii +, Helenium autumnale var. grandiflorum +, Helenium autumnale var. montanum +, Helenium autumnale var. parviflorum +, Helenium latifolium +  and Helenium parviflorum +
Helenium autumnale +
Helenium +
species +
urceolate +  and campanulate +
dilated +
toothed +  and entire +
50 cm500 mm <br />0.5 m <br /> (130 cm1,300 mm <br />1.3 m <br />) +
shrub +  and subshrub +