We present selected contributions from IAB IMOSS SEB 2019, the 2019 International Association of Bryologists (IAB), International Molecular Moss Science Society (iMOSS) and Spanish Bryological Association (Sociedad Española de Briología, SEB) joint conference, held in Madrid, Spain, on July 9-12, 2019. The publications are published in the journal Frontiers in Plant Sciences and listed below: https://www.frontiersin.org/research-topics/11134/highlights-of-iab-imoss-seb-2019-joint-conference#overview Enjoy the reading!