Deep origin and gradual evolution of transporting tissues: Perspectives from across the land plants

Deep origin and gradual evolution of transporting tissues: Perspectives from across the land plants

Evolutionary overview of WCCs throughout the land plant lineage and their occurrence between the haploid (gametophyte) and diploid (sporophyte) phases depicted by green checkmarks. Arrows point at the sporophyte or gametophyte if highly reduced. Representative species are chosen for each clade. Bryophyte listing based on Hébant (1977) and Ligrone et al. (2000, 2012).