88 PROCEEDINGS OP THE AMERICAN ACADEMY. 



Heller. James Isl. : Hill of the Hassler Exp. (in hb. Tuckerraan as 

 R. tinctorial). Seymour Isl. : south, May, 1899, S nod grass & Heller. 

 Further distrib. Peru (a specimen in hb. Farlow cull, by Gaudichaud 

 and distrib. as R. tinctoria, f. dichotoma). 



R. intricata, C. E. Cummings in Rob. & Greenm. (1), 149, coll. by 

 Baur upon Charles Island, has the cortex of Roccella proper and there- 

 fore cannot be placed in Roccellaria where R. intricata properly 

 belongs but is a narrow form of R. peruensis. The same may be said 

 of some, but perhaps not all, of the R. phycopsis, Hassler Exp. \_H'df\ 

 from the Galapagos Islands in herb. Tuckerman. 



Sticta, Schreb. 



S. Weigelii, Wainio, Lichens du Bresil, i. 189 (1890). S. damae- 

 cornis, var. Weigelii, Ach. Licli. Meth. 446 (1810). — Albemarle Isl. : 

 Iguana Cove, 30 Dec. 1898, Snodgrass & Heller. This is the S. 

 quercizans, common throughout the warmer parts of America. 



Teloschistes, Norm. 



T. flavicans, Norm. Gen. Lich., 17, 1852. T. chrysopthalmus, var. 

 flavicans, Auct. ; C. E. Cummings in Rob. & Greenm. (1), 149. 

 Lichen flavicans, Sw. Prodr. 147 (1788). Evernia flavicans, var. 

 crocea, Anderss. (1), 123, & (2), 35. — Albemarle Isl.: Snodgrass 

 & Heller. Charles Isl. : Andersson; Snodgrass & Heller. Chatham 

 Isl.: Baur, ace. to C. E. Cummings, 1. c. Duncan Isl.: Snodgrass & 

 Heller. Further distrib. general. 



Usnea, Dill. 



U. arthroclada, Fee, Ess. Crypt. Ecorc. xcvii. & ci. 3, f. 4, 5 (1824). 

 — Narborough Isl.: southern part, alt. 615 m., 5 April, 1899, on 

 palo santo trees (Bursera graoeolens) with Ramalina usneoides, Snod- 

 grass & Heller. Further distrib. Brazil. 



This has a habit resembling U. longissima but stouter. With potash 

 the medulla turns reddish brown, and this fact with the hard and 

 polished cortex often breaking and forming articulations indicates 

 U. arthroclada. 



U. ceratina, Ach. Lich. Univ. 619 (1810). U. barbata, Ach. f. 

 ceratina Schaer, Spec. 505 (1840). — Narborough Isl. : Snodgrass & 

 Heller. Cosmopolitan. 



U. plicata, Ach. Syn. Meth. 305 (1814) ; Hook. f. (3), 164 ; Anderss. 



