FLORA OF THE GALAPAGOS ISLANDS. 85 



B. sp. — Bindloe Isl.: on rocks, 20 June, 1889, Snodgrass & 

 Heller. 



A single specimen agreeing with some of the specimens referred to 

 B. lactea in herb. Tuckerman, but it is not certain how far these agree 

 with the views of other lichenologists. 



Chiodecton, Ach. 



C. sanguineus!, Wainio, Lichens clu Bresil, ii. 143 (1890). Byssus 

 sanguinea, Sw. Prodr. Fl. Ind. 148 (1783). Hypochnus rubrocinctus, 

 Ehrh. Hor. Phys. Berol. 84 (1820). — Abingdon Isl. : alt. 250 m., 25 

 June, 1899, Snodgrass & Heller. Widely distributed in the warmer 

 parts of the world. 



Cladonia (Mill) Wainio emend. 



C. pycnoclada, Nyl. Jour. Linn. Soc. ix. 244 (1866). Cenomyce 

 pycnoclada, Gaudichaud, Ann. Sci. Nat. Bot. v. 95 (1825). Cladonia 

 rungiferina, var. auct. var. — Albemarle Isl.: mountain east of 

 Iguana Cove, alt. 925 in., Feb. 1899, Snodgrass & Heller ; mountain 

 east of Tagus Cove, alt. 770 m., Feb. 1899, Snodgrass & Heller. 

 Further distrib. S. Am., Africa, Asia, Australia. 



Lecanora, Ach. 



L. glaucovirens, Tuck. Proc. Am. Acad. xii. 172 (1874). — Gala- 

 pagos Ids. : Hassler Exp. [Hill]. Endemic. 



Parmelia, Ach. 



P. perlata, Kremph. Flora, Hi. 222 (1869) ; Anderss. (1), 124, & 

 (2), 36. — Abingdon Isl.: Snodgrass & Heller. Albemarle Isl.: 

 Iguana Cove, Snodgrass & Heller. Charles Isl. : Andersson (specimen 

 not seen by the writer). The specimens of Messrs. Snodgrass & 

 Heller are small and sterile but appear to belong to this common species. 



P. sp. (P. physodi, Fries affinis) Andersson (1)', 124, & (2), 36. — 



Charles Isl. : Andersson. Sterile and indeterminate, not seen by 

 the writer. 



Pertusaria, DC. 



P. albinea, Tuck. Proc Am. Acad. xii. 177 (1877). — Galapagos 

 Ids. : on bark, Hassler Exp. [Hill]. Endemic. 



Physcia (DC.) Th. Fr. 

 P. leucomela (L.) Michx. Fl. Bor.-Am. ii. 306 (1803). Lichen 

 leucomelas, L. Sp. ed. 3, 89 (1764). Parmelia leucomela, aupt. var. 



