The one that looks like a tiny coral reef on the rock has a body that is pale greyish-white to pale greyish-green, with branching, shrubby stalks that rise from the rock like a miniature forest of coral. The stalks are covered in tiny, granular projections (phyllocladia) that give them a rough, bumpy texture. It is the lichen of the pale branch, the one that thrives where little else bothers to grow. What makes it special is the persistence. Stereocaulon lichen is one of the toughest lichens in New Zealand. It grows on bare rock, on exposed ridges, on the sides of boulders where the wind never stops and the sun bakes the stone. It survives extreme temperatures, long droughts, and intense sunlight. It is the lichen of the survivor, the one that grows where nothing else can, the one that has learned to thrive in the harshest conditions. The stereocaulon lichen is a fruticose lichen, meaning it grows upright, like a tiny shrub, rather than flat on the rock. Its stalks are branching and bushy, often forming dense, rounded clumps. The surface is covered in tiny, coral-like bumps (phyllocladia) that are actually small, scale-like branches. These bumps give the lichen its rough, textured appearance. Under a hand lens, the bumps are visible, a miniature landscape of tiny scales. Biologically, the stereocaulon lichen is a partnership, a fungus and an alga living together. The fungus provides structure and protection. The alga provides food through photosynthesis. The stereocaulon lichen is a pioneer species, one of the first to colonise bare rock. It grows very slowly, a few millimetres per year, and a large clump may be decades old. To find stereocaulon lichen is to find the pale coral on the rock. It is pale, branching, and rough, a tiny reef on the stone. You can run your finger over the bumpy surface and feel the rough, coral-like texture. It is the lichen of the pale branch, the one that thrives where little else bothers to grow, the one that proves that the toughest survivors are often the smallest.