a1 Departamento de Biologia Vegetal II, Facultad de Farmacia, Universidad Complutense de Madrid, Ciudad Universitaria, 28040 Madrid, Spain.
Lasallia hispanica (Frey) Sancho & Crespo comb. nov. is proposed as a result of anatomical and morphological comparisons between it and the related species, L. brigantium Zsch. and L. rossica Dombr. For all three species ecological notes, data on world distributions, and a key are provided.
(Accepted August 02 1988)