Helenium L.

First published in Sp. Pl.: 886 (1753)
This genus is accepted
The native range of this genus is N. America to Honduras, Caribbean, S. South America.

Descriptions

George R. Proctor (2012). Flora of the Cayman Isands (Second Edition). Royal Botanic Gardens, Kew

Morphology General Habit
Annual or perennial caulescent herbs, usually with taproots
Morphology Leaves
Leaves alternate, essentially sessile, the lowest ones often pinnately lobed, the upper ones usually not, all beset numerous minute droplets of a resin-like secretion
Morphology Reproductive morphology Inflorescences Peduncles
Peduncles terminal, 1-headed; receptacle usually globose or prolate, naked or with a few short bristles
Morphology Reproductive morphology Inflorescences Bracts
Involucral bracts ca. 16 in 2 series, lanceolate to sublanceolate, usually pubescent and resinous, usually reflexed at maturity; ray flowers absent or present, if present about 8, pistillate or not, fertile or infertile, the rays yellow, apically 3-lobed, often reflexed; disc usually globose or prolate; disc flowers numerous, bisexual, fertile the corollas usually yellow with 5 moniliform-pubescent triangular lobes
Morphology Reproductive morphology Fruits
Achenes obpyramidal with 4 or 5 angles; pappus of 5 translucent scales each of which is prolonged into an awn-like tip, or else the entire scale is narrow and awn-like.
Distribution
A genus of about 40 species, most of them in western N. America.
[Cayman]

Sources

  • Flora of the Cayman Islands

    • Flora of the Cayman Islands
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Herbarium Catalogue Specimens

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0