Balduina Nutt. — commonly called honeycombhead — is a small genus of flowering plants in the family Asteraceae (sunflower family), order Asterales. It was formally described by Thomas Nuttall in 1818 under the spelling Baldwinia, subsequently emended to Balduina. The genus is endemic to the Southeastern United States, where species occur in longleaf pine flatwoods, pine savannas, and coastal plain habitats from Louisiana and Florida north to North Carolina.
Plants in Balduina are herbaceous annuals or perennials bearing yellow daisy-like flower heads. The common name "honeycombhead" refers to the distinctive honeycomb-patterned receptacle visible at the center of the flower head once the ray and disc florets have fallen. The genus contains three accepted species: Balduina angustifolia (coastalplain honeycombhead), Balduina atropurpurea (purpledisc honeycombhead), and Balduina uniflora (oneflower honeycombhead). Balduina atropurpurea is notable for bearing dark purple disc florets, making it visually distinctive within the genus.
The genus is named in honor of William Baldwyn (1779–1819), an American physician and botanist from Savannah, Georgia, who collected plants in the southeastern United States.
Etymology
The genus name Balduina honors William Baldwyn (1779–1819), a physician and botanist from Savannah, Georgia, who collected plants in the southeastern United States. The name was originally published by Thomas Nuttall in 1818 as Baldwinia and later emended to its current spelling.
Distribution
Balduina is endemic to the Southeastern United States. The three species collectively range across Florida, Georgia, Alabama, Mississippi, Louisiana, South Carolina, and North Carolina, with habitats concentrated in longleaf pine savannas and coastal plain flatwoods.
