Future directions
Despite the fact that the study of HP receipt has a history of at least 40 years (Kanchan & Jayachandra 1980), we are just starting to unravel the complexity of its delivery (e.g. Fang & Huang 2013, Tur et al. 2016) and its effects (e.g. Muchhala et al. 2010, Arceo-Gómez & Ashman 2011, Arceo-Gómez et al. 2019b). Thus, much remains to be done in order to fully understand its ecological and evolutionary implications in natural communities. Here I outline a few avenues of future research that may help uncover the importance of HP in generating geographic mosaics of selection and its contribution to shaping patterns of plant diversity across local and global spatial scales.