TY  - BOOK
AU  - Hale, Mason E., Jr.
TI  - A revision of the lichen genus Hypotrachyna (Parmeliaceae) in tropical America
T2  - Smithsonian contributions to botany
U1  - 589.1 
PY  - 1975///
CY  - Washington
PB  - Smithsonian Institution
KW  - Hypotrochyna
KW  - Líquenes
KW  - Parmeliaceas
ER  -