Heliopsis helianthoides

Heliopsis helianthoides is a species of flowering plant in the family Asteraceae, known by the common names rough oxeye,[2] smooth oxeye[3] and false sunflower.[4] It is native to eastern and central North America from Saskatchewan east to Newfoundland and south as far as Texas, New Mexico, and Georgia.[5][6][7]

Heliopsis helianthoides

Secure  (NatureServe)
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Heliopsis
Species:
H. helianthoides
Binomial name
Heliopsis helianthoides
(L.) Sweet
Synonyms[1]

Heliopsis helianthoides is a rhizomatous herbaceous perennial growing 40–150 cm (16–59 in) tall. The toothed leaf blades are oval to triangular or lance-shaped and may be smooth or hairy or rough in texture. The flowers are produced from midsummer to early autumn (fall).[8] The inflorescence contains one to many composite flowerheads. Each head contains yellow ray florets which are generally 2–4 cm (3⁄4–1 1⁄2 in) long. At the center are many yellow to brownish disc florets. The fruit is an achene about 5 mm (0.20 in) long.[5]

In the wild, H. helianthoides may be found in wooded areas and tallgrass prairie, and sometimes along roadsides.[4]

It is a popular garden plant for moist, fertile soil in full sun. Plants grow stiff and tall, so may require staking. Several cultivars are available with flowers of varying colors and shades. These include 'Summer Sun', 'Golden Plume', and 'Prairie Sunset'.[6] The following cultivars of H. helianthoides var. scabra ("rough")[9] have gained the Royal Horticultural Society's Award of Garden Merit:[10]

H. helianthoides Loraine Sunshine='Helhan' [16] is also a recipient of this award.

References
  1. "Heliopsis helianthoides". The Global Compositae Checklist (GCC) – via The Plant List.
  2. "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-01-25. Retrieved 2014-10-17.
  3. "Heliopsis helianthoides". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 19 January 2016.
  4. Heliopsis helianthoides. USDA NRCS Plant Guide.
  5. Smith, Alan R. (2006). "Heliopsis helianthoides". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). 21. New York and Oxford – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  6. Heliopsis helianthoides. Missouri Botanical Garden, Gardening help
  7. "Heliopsis helianthoides". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
  8. RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 1405332964.
  9. Harrison, Lorraine (2012). RHS Latin for gardeners. United Kingdom: Mitchell Beazley. p. 224. ISBN 9781845337315.
  10. "AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 43. Retrieved 3 March 2018.
  11. "Heliopsis helianthoides var. scabra 'Benzinggold'". RHS Plant Selector. Royal Horticultural Society. Retrieved 6 August 2020.
  12. "Heliopsis helianthoides var. scabra 'Light of Loddon'". RHS Plant Selector. Royal Horticultural Society. Retrieved 6 August 2020.
  13. "Heliopsis helianthoides var. scabra 'Sonnenglut'". RHS. Retrieved 6 August 2020.
  14. "Heliopsis helianthoides var. scabra 'Spitzentänzerin'". RHS Plant Selector. Royal Horticultural Society. Retrieved 6 August 2020.
  15. "Heliopsis helianthoides var. scabra 'Waterperry Gold'". RHS Plant Selector. Royal Horticultural Society. Retrieved 6 August 2020.
  16. "Heliopsis helianthoides Loraine Sunshine='Helhan'". RHS. Retrieved 6 August 2020.
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