Llano, GA 1950: A Monograph of the Lichen Family Umbilicariaceae in the Western Hemisphere. - Navexos P-831. Office of Naval Research, Washington, D.C.. 281 pp. [RLL List # 3 / Rec.# 11671] Keywords: UMBILICARIACEAE/ NEW TAXA/ AGYROPHORA/ UMBILICARIA/ OMPHALODISCUS/ ACTINOGYRA/ LASALLIA/ KEYS/ NORTH AMERICA/ SOUTH AMERICA
Abstract: 45 fig. 27 pl. 18 tab. [71 species, 21 varieties. New: Lasallia sect. Pallidae sect. nov., L. papulosa (Ach.) comb. nov. with var. laceratula (Vain.) comb. nov., L. chirquiensis sp. nov., L. sect. Obscurae sect. nov., L. pensylavanica (Hoffm.) comb. nov., L. brigantium (Zsch.) comb. nov., L. glauca (Stiz.) comb. nov., L. membranacea (Laur.) comb. nov., L. rubiginosa (Pers.) comb. nov., L. pertusa (Rassad.) comb. nov., Agyrophora leiocarpa var. nana (Vain.) comb. nov., A. lyngei (Schol.) comb. nov., A. rigida (DR.) comb. nov., A. zahlbruckneri (Frey) comb. nov. with var. robusta var. nov., A. sect. Dichroae sect. nov., A. dichroa (Nyl.) comb. nov., A. haplocarpa (Nyl.) comb. nov. with var. friesii var. nov. and var. kuhnemanii var. nov., A. laevis (Schaer.) comb. nov., A. microphylla (Laur.) comb. nov., A. subglabra (Nyl.) comb. nov., A. schelpei (Frey) comb. nov., Omphalodiscus sect. Decussatae Schol. sect. nov., O. antarcticus (Frey & Lamb) comb. nov. with var. cerebriformis (Dodge & Baker) comb. nov., O. krascheninnikovii (Sav.) Schol. var. formosanus (Frey) comb. nov. and var. darrowii (Frey) comb. nov., O. spongiosus (Dodge & Baker) comb. nov., O. virginis var. orizabanus (Vain.) comb. nov., O. sect. Spadochroae Schol. sect. nov., O. africanus (Jatta) comb. nov., O. corsicus (Frey) comb. nov., O. subarprinus (Frey) comb. nov. with var. durietzii (Frey) comb. nov., Umbilicaria sect. Simplices sect. nov., U. arctica var. diomedensis Merr. var. nov., U. havaasii nom. nov. for Gyrophora fuliginosa Havaas, U. phaea var. subphaea var. nov. and var. coccinea var. nov., U. propagulifera (Vain.) comb. nov., U. torrefacta var. pachydermata var. nov., U. viperina sp. nov., U. sect. Muriformes sect. nov., U. peruviana sp. nov., U. hypococcina (Jatta) comb. nov., U. magnussonii sp. nov., U. solida (Frey) comb. nov., U. diffusa (Nyl.) comb. nov., Actinogyra muhlenbergii var. alpina (Tuck.) comb. nov.]