COLLECTED IN THE ISLAND OP RODRIGUEZ, 435 



Tribe Stictei. 



Stictina dissimilis, Nyl. 



On trees ; sparingly and infertile. Coll. Balf. no. 2277. 



S. agyracea, f. insidiata, Nyl. Thallus somewhat densely covered 

 with isidia. 



On trees ; sparingly and infertile. Coll. Balf. no. 2279. 



* 



Sticta aurata, Ach. 



On trunks of trees; infertile, but apparently common. Coll. Balf. 



no. 2273. 



Tribe Phtsciei. 



Physcia flavicans, f. crocea (Ach.). 



On the branches of trees ; sparingly and sterile. Coll. Balf. no 



2253. 



( Wulf.) 



On trees and rocks ; fertile and apparently common. Coll. Balf. nos. 

 2289, 2324. 



P. iEGiALiTA {Ach. Syn. p. 179, sub Lecanora). 



On rocks ; fertile, but very sparingly gathered, only a single small spe- 

 cimen being present. Coll. Balf. no. 2225. 



P. PICTA (Sw.). 



On the branches of trees; sparingly and sterile. Coll. Balf. no. 

 2373. 



Tribe Ptxinei. 



Pyxine petricola, Nyl, sp. n. " Thallus glaucescens, laciniis sub- 

 intricato-contiguis, adnatis (latit. 1 millim. vel angustioribus), late 

 diffusus; apothecia nigra, planiuscula, lecideina, marginata (latit. 1 

 millim. vel minora), vel margine extus epithallino obducta, intus ob- 



spora 



m caeruleo-nigricans ; 

 Iodo gelatina hyme- 



« 



paraphyses graciles ; hypothecium subincolor. 



nialis bene caerulescens. 



Species certe bene distincta notis allatis. Thallus K = ."—Nyl. 



in litt. 



n rocks; sparingly gathered. Coll. Balf. no. 2391. 



