“…Reproductive character displacement -the modification of reproductive traits in sympatric populations of related species -is widely considered to be a key mechanism facilitating co-occurrence, reproductive isolation, and ecological and evolutionary divergence (J A Coyne & Orr, 2004; Jerry A Coyne, 1992;Grant & Grant, 2011;Mayr, 1947). This is especially true for the timing (phenology) of flowering, which is strongly linked to fitness and often highly variable even among closely related taxa (Briscoe Runquist, Chu, Iverson, Kopp, & Moeller, 2014;Brody, 1997;Domínguez & Dirzo, 1995;Galloway, 2002;Kelly & Levin, 2000;Lacey, Roach, Herr, Kincaid, & Perrott, 2003;Lowry, Rockwood, & Willis, 2008;Park et al, 2018;B Rathcke & Lacey, 1985;Sletvold, Moritz, & Ågren, 2015;Spriggs et al, 2019;Stinson, 2004).…”