“…Examples of such methylation‐based regulatory mechanisms include reversible marking of boundaries between euchromatin and heterochromatin at m CHH (H = A, C, T) sites mediated by small interfering RNA (siRNA) (Khraiwesh et al., 2012; Li et al., 2015; Roudier et al., 2009), changes in the expression state of epialleles mediated by repeat sequences near the affected gene (Weigel & Colot, 2012), or methyltransferase enzymes that transfer or de novo create methylation marks at CpG, CpHpH or CpNpG (N = A, C, G, T) sites (Cao & Jacobsen, 2002). These mechanisms play a role in phenotypic plasticity (Nicotra et al., 2010) and stress‐related adaptation in plants (Boyko & Kovalchuk, 2008) and can be transmitted to the next generation (Henderson & Jacobsen, 2007; Jablonka & Raz, 2009; Thamban et al., 2019; Verhoeven & van Gurp, 2012). The involvement of epigenetic regulation in ecological and evolutionary responses could resolve the paradox of rapid local phenotypic differentiation in invasive plant species with limited genetic variation and a short time since introduction (Richards et al., 2012; Schrieber & Lachmuth, 2017).…”