Liverworts new to Colombia

Based on our ongoing studies of the bryophyte flora of Colombia we report 15 liverwort species new to the country: Archilejeunea nebeliana, Colura calyptrifolia, Dibrachiella auberiana, Fossombronia fernandeziensis , Isopaches bicrenatus, Lejeunea angusta, L. concinnula, L. corynantha, L. galeata, L. pulverulenta , L. serpillifolioides , L. tapajosensis, Leptoscyphus hexagonus, Marchesinia languida and Riccia planobiconvexa. Notes are provided on the distribution, habitat and taxonomic differentiation of the species. Lejeunea cochleata is a new synonym of L. angusta, and Taxilejeunea steyermarkii is a new synonym of Lejeunea pulverulenta . With 730 species recorded, in 40 families, Colombia is probably the richest country in liverworts in tropical America.