Helianthus tuberosus L.
  • Sp. Pl.
  • Girasole del Canada, Topinambur


Cite taxon page as 'WFO (2021): Helianthus tuberosus L. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000091975. Accessed on: 04 Dec 2021'

General Information

Herbs, perennial, 50-200 cm, rhizomatous, producing tubers late in growing season. Stems erect, scabrid-hispid to hirsute, sometimes glaucous. Leaves mostly cauline, opposite or alternate proximally, usually alternate distally; petiole 2-8 cm, often ± winged; blade lanceolate to ovate, 10-23 × 7-15 cm, 3-veined from near base, abaxially puberulent or hirsutulous to tomentulose and gland-dotted or ± scabrid, base broadly to narrowly cuneate, margin entire or serrate. Capitula 3-15; peduncles 1-15 cm; involucres hemispheric, 10-25 × 8-12 mm; phyllaries often dark green, drying nearly black, 22-35, subequal, lanceolate, 8.5-15 × 2-4 mm, abaxially hispidulous or puberulent, gland-dotted, base appressed, margin ciliate, apex ± spreading, sometimes reflexed in fruit, acuminate; paleae 8-9 mm, 3-toothed, apices hairy. Ray florets 10-20; lamina 25-40 mm. Disk florets 60+; corollas 6-7 mm, lobes yellow; anthers dark brown or black, appendages dark or yellowish. Achenes 5-7 mm, glabrous or apically hairy; pappus of 2 aristate scales 1.9-3 mm plus 0-1 deltate scales 0.5-0.8 mm. Fl. Aug-Sep. 2n = 102.

  • Provided by: [C].Flora Of CHina @ efloras.org
    • Source: [
    • 1
    • ]. 

    Perennials, 50–200+ cm (rhizomatous, producing tubers late in growing season). Stems erect, scabro-hispid to hirsute (sometimes glaucous). Leaves mostly cauline; opposite or alternate proximally, usually alternate distally; petioles 2–8 cm (often ± winged); blades (3-nerved from near bases) lanceolate to ovate, 10–23 × 7–15 cm, bases broadly to narrowly cuneate, margins entire or serrate (flat), abaxial faces puberulent or hirsutulous to tomentulose and gland-dotted (abaxial) or ± scabrous (adaxial). Heads 3–15. Peduncles 1–15 cm. Involucres hemispheric, (10–25 ×) 8–12 mm. Phyllaries (often dark green, drying nearly black) 22–35 (bases appressed, apices ± spreading, sometimes reflexed in fruit), lanceolate, 8.5–15 × 2–4 mm (subequal), (margins ciliate) apices acuminate, abaxial faces hispidulous or puberulent, gland-dotted. Paleae 8–9 mm, 3-toothed (apices hairy). Ray florets 10–20; laminae 25–40 mm. Disc florets 60+; corollas 6–7 mm, lobes yellow; anthers dark brown or black, appendages dark or yellowish. Cypselae 5–7 mm, glabrous or distally hairy; pappi of 2 aristate scales 1.9–3 mm plus 0–1 deltate scales 0.5–0.8 mm. 2n = 102.

  • Provided by: [E].Flora of North America @ efloras.org
    • Source: [
    • 2
    • ]. 

    "Perennial with well developed, commonly tuber- bearing rhizomes; stems stout, 1–3 m, ± spreading-hairy; lvs numerous, those of the upper half or 2/3 of the stem alternate in well developed plants, scabrous above, short-hairy beneath, broadly lanceolate to broadly ovate, the better developed ones mostly 10–25 × 4–12 cm, serrate, abruptly contracted or somewhat tapering to the winged petiole, this 2–8 cm; heads often many in a corymbiform infl, the disk yellow, 1.5–2.5 cm wide; invol bracts rather dark, especially near the base, narrowly lanceolate, acuminate or subattenuate, loose especially above the middle, often hispidulous; rays 10–20, 2–4 cm; 2n=102. Moist soil and waste places; nearly throughout e. U.S. and adj. Can., and w. across the Great Plains. (H. subcanescens, small plants with chiefly opposite lvs)"

  • Provided by: [B].New York Botanical Garden
    • Source: [
    • 3
    • ]. 

    Morphology

    0,5–3 m hoch, oben meist verzweigt, rauhaarig, mehrjährig, mit rübenförmigen bis kugeligen Wurzelknollen. Blätter breit-lanzettlich, grob gezähnt, gegenständig (oberste wechselständig), alle ± gleich gross. Blütenköpfe meist mehrere, lang ge

  • Provided by: [D].Flora Helvetica – Illustrierte Flora der Schweiz
    • Source: [
    • 4
    • ]. 

    Ecology

    9–11. Schuttplätze, Ufer, Wegränder, aus Gärten verwildert, kollin.

  • Provided by: [D].Flora Helvetica – Illustrierte Flora der Schweiz
    • Source: [
    • 4
    • ]. 

    Other Local Names

    NameLanguageCountry
    Girasole del Canada, TopinamburItalianCH
    Topinambur, Flur-sulegl canadaisaRaeto-RomanceCH
    TopinamburGermanCH
    TopinambourFrenchCH

      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).
    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.
    • B Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Flora Of CHina @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=2
    'Flora of China @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=2 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • C Missouri Botanical Garden
    Flora Helvetica – Illustrierte Flora der Schweiz
    http://www.flora-helvetica.ch
    Flora Helvetica – Illustrierte Flora der Schweiz, Konrad Lauber, Gerhart Wagner, Andreas Gygax. Haupt Verlag 2018.
    • D All Rights Reserved
    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.
    • E Flora of North America Association
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • F CC0 1.0 Universal (CC0 1.0).