(Of a liverwort) having leaves which point forward so that their upper edges overlap the lower edges of the leaves above. Often contrasted with succubous.
- Leaf overlap in a lateral row of leaves is either succubous (bottom of upper leaf overlaps top of lower leaf) or incubous (top of lower leaf overlap bottom of upper leaf).
- Leaves may be transverse (with leaves coming off at right angles to the stem), incubous (the apex-facing edge of the leaf overlapping the base of the leaf above it), or succubous (the opex facing edge of the leaf overlapped by base of the leaf above it).
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