Sarah Ashlock

CONFLICT OF INTEREST STATEMENT The authors declare no conflicts of interest. PEER REVIEW The peer review history for this article is available at https://www.webofscience.com/api/gateway/wos/peer-review/10.1111/1365-2745.70379. DATA AVAILABILITY STATEMENT All data are available on the Dryad data repository which also links to Zenodo where the analysis scripts and GitHub repository are available (Quarles-Chidyagwai et al., 2026; https://doi.org/10.5061/dryad.ncjsxktbf).

Abstract Understanding how plant populations respond to environmental variation through functional leaf traits remains challenging due to limitations of traditional phenotyping approaches. Hyperspectral reflectance offers a rapid, non-destructive and high-throughput method to capture functional trait variation and detect signatures of local adaptation across populations.

Abstract The timing of early life cycle events has cascading effects on phenology and fitness. These effects may be critical for climate resilience of plant populations, especially in Mediterranean environments, where delayed rainfall onset causes delayed germination. To examine impacts of germination timing on ten species of the Streptanthus/Caulanthus clade, we induced germination across a range of dates in ambient seasonal conditions and recorded phenological and fitness traits.