Abstract
Lepisorus rufofuscus T. Fujiw. (Polypodiaceae, Polypodiales), a Japanese species previously treated as L. angustus Ching, is described as new based on integrated evidence from phylogenetics, cytology, and morphology. It is morphologically segregated from L. angustus by the broadly lanceolate or ovatelanceolate rhizome scales and the ovate leaf scales in the former, but narrowly lanceolate and lanceolateleaf scales in the latter. Although it shows close phylogenetic affinity with L. contortus (Christ) Ching, it is distinct from the latter in basic chromosome number and can be morphologically distinguished from L. contortus in the rhizome scales; opaque center band broader and longer in the former but narrower and shorter in the latter.
