258 
B. RUBESCENS (Arn.) Eck. 
Thallus very thin, white, uneven and broken up into areole- 
like flat scales; apothecia scattered, sessile, small, from flat to con- 
cave, with a prominent raised margin but frequently wanting, from 
reddish-brown to black; spores broadly ellipsoid, bilocular, = 
mic. On smooth barks. 
LecaANnactis (Esch. Kbr.) Tuck. 
L. abtetina Ach. 
L. premnea Ach. 
OPEGRAPHA (Humb.) Ach. 
O. zonata Kbr. 
Thallus rufous to ferruginous, thin, subtartareous, smoothish, 
covered by nnmerous yellow or pale whitish soredia, marked at 
the border by conspicuous thick erect dark lines forming the 
hypothallus ; apothecia fuscous to black, scattered, sparse and ses- 
sile; spores hyaline, contracted, fusciform, pointed, °° mic. On 
rocks. Sie 
O. atra Ach. 
_O. vulgata Ach. 
XYLOGRAPHA Fr. 
X. opegraphella Nyl. 
X. parallela Fr. 
GrRaAPHIS Ach. 
G. scripta (L.) Ach. 
Var. recta Schr. 
Var. varia Ach. 
Var. limitata Schr, 
Var. pulverulenta Pers. 
F. radiata Leight. 
F. flexuosa Leight. 
F. typographa Willd. 
ARTHONIA Ach. 
A. radiata Pers. 
Var. Swartzoidea Nyl. 
A. spectabilis F\. 
A. punctiformis Ach. 
A. patellulata Nyl. 
A. raunidia Ny). 
