Texture and Hygroscopic Features of the Upper Surface of the Thallus in the Lichen Family Umbilicariaceae

Annals of Botany - Tập 73 - Trang 493-500 - 1994
Fernando Valladares1
1Centro de Ciencias Medioambientales, CSIC, Serrano 115 dup, 28006 Madrid, Spain