202 E. Tuckerman on North American Lichens. 
pulverulentis; apotheciis terminalibus dilatatis demum convexis. 
Spore generis. §. nanum, Tuck. Synops. N. E. p. 46, pr. p.— 
Rocks near water, (Crystal Falls; Saco Falls; Upper Gorge of 
the Ammonoosuck) in the White Mountains, S. nanum of Eu- 
Topean authors (Fr. Lich. Suec. n. 59; Scheer. Lich. Helv. n. 
Moug. and Nestl. Crypt. Vog. n. 647) appears to be an 
atypical condition, and has not yet occurred with us, but I have 
hitherto taken the present as representing the perfect a of the 
species. The full development of our lichen seems however to 
indicate a different affinity, and to separate it from the section 
(Chondrocaulon, Th. Fr.) aes a ences S. nanum. It is per- 
haps rather nearer to 8. denu 
glabris nitidis suabcompressis acunosis stramineis ap aati o-ramo- 
sis, phyllocladiis = apices confertis minutis nomnONee mox de- 
liquescentibus Pee ie Wh apotheciis..... Islands 
cia of this last as’ are unknown. 
[AtEcrorIA Japonica, sp. nova, thallo subciespitoso tereti 
rigido sorediis albis exasperato stramineo, ramis sterilibus ramo- 
sissimis implexis attenuatis subfilamentosis, fertilibus simplicius- 
culis incrassatis, apicibus nigricantibus; esaheciie sabterminali- 
bus superficiali-sessilibus appendiculatis disco concayo demum 
expanso plano nitido castaneo. Spore majuscule ellipsoide» 
limbate viridi-fuscescentes demum subhyaline.—On dead pine 
trees, Ayan, Japan, Mr. Wright. Nearest to A. ochroleuca, but 
Very much in habit, and in fructification. The spores 
ery unlike those of Pertusaria pertusa.] 
