Epilobium glabellum is a sub-shrub of variable habit in the wild – it can grow up to 12 in (30 cm) high. The oval green leaves are toothed. The white bell-like flowers, up to 1 in (2.5 cm) across, are carried towards to branch tips, June to September.
Epilobium glabellum is a common willow-herb of lowland to high-alpine regions, North and South Islands, New Zealand, found from the East Cape southwards, although not in the very driest areas. It can be grown in rock gardens in moist soil.