Coreopsis grandiflora

Coreopsis grandiflora is a North American species of perennial plant in the sunflower family Asteraceae. The common name is large-flowered tickseed.[4] It is found in eastern Canada (Quebec, Ontario, New Brunswick) and much of the United States, especially the south-central part of the country (Oklahoma, Arkansas, etc.).[5] The species is widely cultivated in China and naturalized there.[6]

Coreopsis grandiflora
Watercolor circa 1895[1]
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Coreopsis
Species:	C. grandiflora
Binomial name
Coreopsis grandiflora Hogg ex Sweet 1826 not Nutt. ex Chapm. 1860[2]
Synonyms[3]
Coreopsis boykiniana Nutt. Coreopsis harveyana A.Gray Coreopsis heterolepis Sherff Coreopsis heterophylla Nutt. 1841 not Cav. 1795 Coreopsis longipes Hook. Coreopsis saxicola Alexander

Coreopsis grandiflora is a perennial sometimes greater than 60 cm (2 feet) tall. It produces yellow ray and disc flowers.[7]

In the UK the cultivar 'Early Sunrise'[8] has received the Royal Horticultural Society's Award of Garden Merit.

Coreopsis grandiflora 'Sunburst'

References

1. illustration by Alois Lunzer (1840-?)
2. Tropicos search for Coreopsis grandiflora
3. The Plant List, Coreopsis grandiflora Hogg ex Sweet
4. "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-01-25. Retrieved 2014-10-17.
5. Biota of North America Program 2014 county distribution map
6. Flora of China, 大花金鸡菊 da hua jin ji ju Coreopsis grandiflora Hogg ex Sweet
7. Flora of North America, Coreopsis grandiflora Hogg ex Sweet, Brit. Fl. Gard. 2: plate 175. 1826.
8. "Coreopsis grandiflora 'Early Sunrise'". RHS. Retrieved 12 April 2020.