2025/11/12 by Patrick McKenzie, Samuel H. Church, Robin Hopkins · 1 voice
Agricultural and Biological Sciences · Biochemistry, Genetics and Molecular Biology · Chemistry · #Color analysis #Divergence (linguistics) #Image (mathematics) #Plant Gene Expression Analysis #Plant and Biological Electrophysiology Studies #Plant morphology #Wood and Agarwood Research
paper · doi:10.1086/739413
openalex created_date 2025/11/12 · openalex publication_date 2025/11/12 · openalex updated_date 2026/07/31
Characterizing patterns of trait variation across widespread species is a fundamental goal of natural history. Here we create a pipeline to analyze a large community science dataset and test hypothesized flower color divergence across the range of an abundant wildflower. Monarda fistulosa is a North American perennial that produces showy lavender inflorescences. Although previous literature suggests that the flowers of western M. fistulosa might display a deeper purple color than the eastern varieties, this divergence has not been assessed at scale. We process more than 40,000 community science photographs of M. fistulosa to identify flowers and extract color. We demonstrate that the flowers of the montane western variety have lower lightness and higher chroma, corresponding to a deeper violet color, than those of eastern M. fistulosa. Our approach and validation provides a scalable framework for phenotyping community science images and enables analysis of geographic color variation in other widespread species.