88 PROCEEDINGS OF THE AMERICAN ACADEMY. 
Heller. James Isx.: Hill of the Hassler Exp. (in hb. Tuckerman as 
ft. tinetoria). Seymour Ist.: south, May, 1899, Snodgrass & Heller. 
Further distrib. Peru (a specimen in hb. Farlow coll. 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 MRoccellaria 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. [Hill] 
from the Galapagos Islands in herb. Tuckerman. 
Sticta, Schreb. 
S. Weicetu, Wainio, Lichens du Brésil, i. 189 (1890). S. damae- 
cornis, var. Weigelii, Ach. Lich. Meth. 446 (1810). — ALBEMARLE IsL. : 
Iguana Cove, 30 Dec. 1898, Snodgrass & Heller. This is the S. 
quercizans, common throughout the warmer parts of America. 
TreLoscuistes, Norm. 
T. rLavicans, Norm. Gen. Lich., 17, 1852. TJ. chrysopthalmus, var. 
flavicans, Auct.; C. E. Cummings in Rob. & Greenm. (1), 149. 
Lichen flavicans, Sw. Prodr. 147 (1788). Hvernia flavicans, var. 
erocea, Anderss. (1), 123, & (2), 35.— ALBemarRLE Isu.: Snodgrass 
& Heller. Cuarues Isu.: Andersson; Snodgrass & Heller, CuaTHaM 
Ist..: Baur, ace. to C. E. Cummings, l.c. Duncan Ist.: Snodgrass & 
Heller. Further distrib. general. 
Usnea, Dill. 
U. artnrocrana, Fée, Ess. Crypt. Ecore. xevii. & ci. 3, f. 4, 5 (1824). 
— Narzorouen Ist.: southern part, alt. 615 m.,5 April, 1899, on 
palo santo trees (Bursera graveolens) with Ramalina usneoides, Snoa- 
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). — Narsoroueu Ist.: Snodgrass & 
Heller. Cosmopolitan. 
U. pticata, Ach. Syn. Meth. 305 (1814) ; Hook. £. (3), 164; Anderss. 
