Moss is devilishly hard to transplant, but quite by accident I’ve got a couple small colonies of it going indoors in the pots for other houseplants. It makes an especially nice groundcover for my jade plant.

Fungi are their own kingdom now — one of either five or seven kingdoms, depending on who you talk to — so yeah, it’s correct to say that a lichen is a partnership between a fungus and a plant, or between a fungus and a cyanobacterium (classed either in Monera or in Bacteria).