Plants

Bryophytes are small plants whose life cycle depends heavily on moisture. Their diversity is not only green: there are different shapes, colours and textures. According to the scientific presentation from Serralves, they contribute to nutrient recycling and can colonise surfaces where other plants cannot yet establish themselves, helping soil form. Learning about this group brings new questions to a walk, without needing to pull up specimens.

Mosses have no true roots. Kew describes rhizoids as small filaments whose main role is anchoring the plant to rock, bark or soil. Absorbent surfaces help take up water and minerals from the surroundings. Contact with moisture is therefore part of how they live.

They do not produce flowers either: they reproduce through spores. Spaces between the small plants help retain water, keeping the soil and nearby surroundings moist. These carpets can also shelter small animals.

This does not mean all mosses need the same conditions. Species are adapted to very different environments, and some survive dry periods in a dormant state. A green patch on a wall is not enough to identify a species or explain its whole life cycle.