Vascular Plants of North Carolina
Account for Largeflower Tickseed - Coreopsis grandiflora   Hogg ex Sweet
Members of Asteraceae:
Members of Coreopsis with account distribution info or public map:
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Section 6 » Order Asterales » Family Asteraceae
AuthorHogg ex Sweet
DistributionSouthern Mountains as a native taxon; Piedmont and Coastal Plain as a non-native taxon. To date, found in only Caswell, Jackson, Macon, Moore, and Wilson counties. Collections from other counties are likely misidentifications or introductions.

NC to GA, west to OK and TX. This species is widely cultivated, and thus its natural range is somewhat difficult to define, though most references treat it as native to NC.
AbundanceRare in the Macon and Jackson area of the southwestern Mountains, with five records in the NCNHP database. Extremely rare elsewhere (as a non-native taxon). This is a Significantly Rare species.
HabitatRock outcrops, openings on montane slopes. "In thin soils of rock outcrops, especially granitic flatrocks and granite domes" (Weakley 2018). [None of the NC sites are on granitic flatrocks.]
PhenologyFlowering and fruiting late May - late June.
IdentificationCharacters that help identify this species are: leaves with distinct stalks (vs. sessile), leaves dissected into linear or threadlike segments, ray florets tipped with 4-5 blunt teeth, and disk florets dark yellow.
Taxonomic CommentsThere are several described varieties; see Weakley (2020) for identification and distributions. The taxon in the southern mountains is var. grandifloravar. harveyana, not native in the Atlantic states.

For excellent drawings of all species (except those recently described) and range maps (although now out-of-date), see the monograph by Smith (1976).
Other Common Name(s)Largeflower Coreopsis, Early Sunrise Tickseed
State RankS1
Global RankG5
State Status[SR-O]
US Status
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