The term incubous describes the way in which the leaves of a liverwort are attached to the stem. If one were to look down from above (dorsal side) on a plant where the leaf attachment is incubous, the upper edge of each leaf would overlap the next higher leaf along the stem.
ADJ（形容词）
(of a liverwort) having the leaves arranged so that the upper margin of each leaf lies above the lower margin of the next leaf along (苔藓)有蔽前式叶的 → compare succubous