Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Coreopsis at Vascular Plants of North Carolina.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
Large-flowered Coreopsis, Largeflower Tickseed
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Richard and Teresa Ware rtw_c_grandiflora_harveya
The yellow ray flowers are conspicuously notched, per Guide to the Plants of Granite Outcrops.