USNEACEAE. 549 



2. Parmelia sulphurata Nees & Flot. Linnaea 9: 501. 1834. 



On trees, New Providence, at Maidenhead Coppice : widely distributed in tro^ 

 ical regions of both hemispheres- 



3. Parmelia flava Krempelh. in Warming, Symbol. Flor. Bras, in Vulensk. 



MedcTel. 9. 1873. 



On tree, Andros, along road to Conch Sound : Brazil. 



4. Parmelia latissima Fee, Suppl. Essai Crypt, 119, pi. 38, f. 1. 1S37. 



On trees, Abaco, New Providence, Watling's Island, Crooked Island : widely 

 distributed in the warmer regions of both hemispheres. 



4a. Parmelia latissima var. cristifera (Taylor) Hue, Nouv. Arch. Mus. Hist. 

 Nat. Paris IV: 1: 204. 1899. 



Parmelia cristifera Taylor in Hook. Journ. Bot. 6 : 165. 1847. 



On trees, New Providence, at Maidenhead Coppice : distributed as in the typi- 

 cal form. 



5. Parmelia perlata (L.) Ach. Metli. Lich. 216. 1803. 



Lichen perlatus L. Syst. Nat. ed. 12, p. 712. 1767. 

 On trees, Great Bahama, New Providence : cosmopolitan. 



Family 14. USNEACEAE. 



Medulla of loosely interwoven hyphae ; spores two-celled. 1. RamaUna. 



Medulla with a tough central strand of compacted hyphae; 



spores simple. 2. Vsnen. 



1. RAJVLALINA Aeh. 



Thallus more or less sorediate. 1. R. peruviana. 

 Thallus without soredia. 



Thallus elongated and pendulous. 2. R. usneoides. 

 Thallus short and erect. 



Branches flattened; spores ellipsoid. 3. R. complanata. 



Branches more or less cylindrical ; spores fusiform. 4. R. Montaynei. 



1. Ramalina peruviana Ach. Lich. Univ. 599. 1810. 



On trees, Crooked Island, road to Stopper Hill : Jamaica ; Porto Rico ; Curasao 

 Island ; Peru. 



2. Ramalina usneoides (Ach.) Fr. Lich. Europ. 468. 1831. 



Parmelia usneoides Ach. Meth. Lich. 270. 1803. 



On branches of trees, Abaco and Watling's Island : widely distributed in trop- 

 ical regions of both hemispheres. 



3. Ramalina complanata (Sw.) Ach. Lich. Univ. 599. 1810. 



Lichen complanatus Sw. Fl. Ind. Occ. 3: 1911. 1806. 



Eamalina denticulata (Eschw.) Nyl. Bull. Soe. Linn. Norm. II: 4: 129. 



1870. 



On trees, Abaco, New Providence, Eleuthera and Long Island : widely dis- 

 tributed in the warmer regions of both hemispheres. 



4. Ramalina Montagnei DeNot. Giorn. Bot. Ital. 2: 218. 1846. 



Eamalina rigida var. Montagnei Tuck. Syn. N. A. Lich. 1: 23.' 1882. 



On twigs and branches, Great Bahama, New Providence, Cat, Watling's, and 

 Acklin Islands : southern United States ; Cuba ; Jamaica ; Porto Rico. 



