Helenium autumnale L.
  • Sp. Pl. 886.


Cite taxon page as 'WFO (2021): Helenium autumnale L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000124883. Accessed on: 23 Oct 2021'

General Information

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 yellow-brown 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.

  • Provided by: [B].Flora of North America @ efloras.org
    • Source: [
    • 1
    • ]. 

    "Fibrous-rooted perennial 5–15 dm, glabrous to finely strigose or puberulent; lvs numerous, all or mainly cauline, lance-linear to elliptic or narrowly ovate, narrowed to a sessile or subpetiolar base, decurrent as wings on the stem, not much reduced upwards, 4–15 cm × 5–40 mm, the lower ones deciduous; heads (1–)several or many in a leafy infl, hemispheric or subglobose, the disk yellow, 8–20 mm wide; rays ca 13 to ca 21, pistillate, mostly 1.5–2.5 cm; pappus- scales generally brownish, ovate or lanceolate, tapering to a short awn, to ca 1 mm overall; 2n=32, 34, 36. Moist low ground; Que. to Fla., w. to B.C. and Ariz. Aug.–Oct. The var. autumnale, with elliptic to oblong or lanceolate, generally toothed lvs 3–6 times as long as wide, occurs from Conn. to Minn., s. to Fla. and Tex. (H. altissimum; H. latifolium; H. parviflorum) The var. canaliculatum (Lam.) Torr. & A. Gray, a usually smaller, sometimes single-headed plant with narrower, mostly subentire lvs 7–12 times as long as wide, occurs from Que. to N.Y., w. to Wis. Other vars. occur westward."

  • Provided by: [C].New York Botanical Garden
    • Source: [
    • 2
    • ]. 

      Bibliography

     Information From

    Compositae
    CC0 1.0 Universal (CC0 1.0). https://creativecommons.org/publicdomain/zero/1.0
    • A CC0 1.0 Universal (CC0 1.0).
    Flora of North America @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=1
    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Flora of North America Association
    New York Botanical Garden
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • C Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • D CC0 1.0 Universal (CC0 1.0).