Chasmophyte

A chasmophyte, or crevice plant, is a plant adapted to grow in rock crevices, cliff faces, stone walls, and other narrow fissures, where accumulated humus, soil, and organic matter provide access to water and nutrients. The term is derived from the Greek words chasma ("crevice" or "gorge") and phyte ("plant"). Chasmophytes differ from lithophytes in that the term refers specifically to plants growing in rock fissures, cracks, and crevices, whereas lithophytes include all plants that grow on or among rocks, including those rooted on rock surfaces.

In horticulture, crevice gardens have been used as a method of transforming disturbed or underutilised sites into planted landscapes that mimic natural rocky habitats. Common examples include low-growing herbs, succulents, bellflowers, and other plants that naturally occur on rocky outcrops, cliffs, and stone walls.