Coreopsis verticillata

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Coreopsis verticillata
Coreopsis verticillata.jpg
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Genus: Coreopsis
Species: C. verticillata
Binomial name
Coreopsis verticillata
L.

Coreopsis verticillata is a North American species of tickseed in the sunflower family. It is found primarily in the east-central United States, from Maryland south to Georgia, with isolated populations as far west as Oklahoma and as far north as Québec and Ontario.[1] The common names are whorled tickseed,[2][3] whorled coreopsis, thread-leaved tickseed, thread leaf coreopsis, and pot-of-gold.

Description[edit]

Coreopsis verticillata is an herbaceous perennial that grows 2–3 ft (1–1 m) tall and about 2 ft (1 m) wide, although as it spreads laterally by rhizomes,[4] this width can be exceeded. The stems are wiry.[5] The flower heads are up to 2 in (51 mm) across, and both the disc florets and ray florets are bright yellow. The flowers are produced abundantly in clusters from midsummer to fall.[6]

Habitat[edit]

Coreopsis verticillata can commonly be found in dry, thin woods and open pinelands, preferring sites with full sun exposure. It can tolerate drought, poor soil, extreme heat, and neglect.[5]

Horticultural cultivation[edit]

Coreopsis verticillata and its horticultural cultivars are not difficult to grow and hence make good starter plants for beginners. They have a long flowering season and are relatively free from pests and diseases. They attract butterflies and are deer resistant.[7] They can be grown in hanging baskets and containers (where irrigation will be necessary), or as border plants.[8] Carolyn Singer, in "Deer in My Garden", reports that C. verticillata is a good companion plant with other summer-blooming perennials requiring similar conditions.[9] The following notable cultivars have all gained the Royal Horticultural Society's Award of Garden Merit:-

  • 'Grandiflora' - taller than other cultivars, with slightly larger flowers[10]
  • 'Moonbeam' - pale, sulphur-yellow flowers, slightly shorter growth, chosen as the 1992 Perennial Plant of the Year by the Perennial Plant Association.[5] When this cultivar was first introduced to the market, demand outstripped supply in some localities, such was its popularity.[11][12]
  • 'Zagreb' - shorter than the species, bright yellow flowers[13][14]

References[edit]

  1. ^ Biota of North America Program 2014 county distribution map
  2. ^ "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-02-25. Retrieved 2014-10-17. 
  3. ^ "Coreopsis verticillata". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 17 January 2016. 
  4. ^ "Coreopsis verticillata L.". Wildflower Center at The University Of Texas At Austin. Retrieved 2010-02-20. 
  5. ^ a b c Christman, Steve. "Coreopsis verticillata". Floridata. Retrieved 2010-02-20. 
  6. ^ Flora of North America, Coreopsis verticillata Linnaeus, Sp. Pl. 2: 907. 1753.
  7. ^ "Coreopsis verticillata 'Moonbeam'". Perennial Resource. Retrieved 2010-02-20. 
  8. ^ "Coreopsis verticillata". Magnolia Gardens Nursery. Retrieved 2010-02-20. 
  9. ^ Singer, Carolyn (2006). Deer in My Garden: Vol. 1: Perennials & Subshrubs. Emerald Book. ISBN 978-0-9774251-0-5. 
  10. ^ "RHS Plant Selector Coreopsis verticillata 'Grandiflora' AGM / RHS Gardening". Apps.rhs.org.uk. Retrieved 2013-06-06. 
  11. ^ Iannotti, Marie. "Coreopsis verticillata 'Moonbeam'". About.com. Retrieved 2010-02-20. 
  12. ^ "RHS Plant Selector Coreopsis verticillata 'Moonbeam' / RHS Gardening". Apps.rhs.org.uk. Retrieved 2013-06-06. 
  13. ^ "Coreopsis verticillata Zagreb". North Creek Nurseries. Retrieved 2010-02-20. 
  14. ^ "RHS Plant Selector Coreopsis verticillata 'Zagreb' AGM / RHS Gardening". Apps.rhs.org.uk. Retrieved 2013-06-06.