USNEACEAE. 549 



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



On trees, New Providence, at Maidenhead Coppice : widely distributed in troi* 

 ical regions of both hemispheres. 



3. Parmelia fiava Krempelh. in Warming, Symbol. FW. Bras, in Viilensk. 



Meddel. 9. 1873. 



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



4. Parmelia latissima Fee, Suppl. Essai Crypt. 119, pi. 38, f. 1. 1837. 



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.) Aeh. Meth. 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. Ramalina. 



Medulla with a tough central strand of compacted hyphae; 



spores simple. 2. Usnea. 



1. RAMALINA Ach. 



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 ; Curagao 

 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. 



Ramalina denticulata (Esehw.) Nyl. Bull. Soc. 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. 



Ramalina 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 1'nited States; Cuba; Jamaica; Porto Kico. 



