Two new species of Eriocaulon (Eriocaulaceae) from Sierra Leone

Summary Two new species of Eriocaulon (Eriocaulaceae) from the Sula Mountains in northern Sierra Leone are described and illustrated. Eriocaulon petraeum S. M. Phillips & Burgt is a perennial herb forming dense clumps on bedrock and boulders in the riverbed of the Tonkolili River in the Sula Mountains. Eriocaulon sulanum S. M. Phillips & Burgt is a perennial herb forming dense cushions in muddy/sandy patches between rocks at the edge of the same river. Both species flower and fruit during the dry season, when the plants are above the water level. Both species are assessed as Critically Endangered.