(157 ) 
Mont. (Lecidea endochlora, Tayl. 1. c. Biatora Tuckermani, Fr. herb. 
Lecanora Wrightii, Tuck. 1. c.) for the reference of which to the original 
description, I am again indebted to Dr. Nylander. The greenish-yellow 
thallus of this contrasts pleasingly with that of the preceding. Mon- 
tagne’s specimens of his species were from Valparaiso, and Taylor’s from 
Buenos Ayres. With us the lichen occurs from Texas (Mr. Wright) to 
Kansas (Mr. Hall) and still further northward to lat. 46° in Minnesota 
(Mr. Lapham). 
The large group succeeding corresponds with Hulecanora, and may be 
distinguished as Eubiatora. Characterized for the most part by the 
granulose type of thallus, not seldom much reduced, this ascends also to 
squamulose conditions, now but ill-separable from Psora. Among these 
the most interesting and difficult is B. coarctata (Ach.) Th. Fr., probably 
cosmopolitan, which occurs in this country in various forms, from Ver- 
mont (on calcareous rocks, Mr. Frost; on manganese ore, Rev. Dr. 
Hitchcock) and Massachusetts (on granite, Mr. Willey) to South Carolina 
(on sand-rock, Mr. Ravenel) and California (on the earth, Mr. Wright ; 
Mr. Bolander). Distinctly biatorine conditions of this lichen were re- 
ferred to his Lecidea by Acharius, as also by Borrer (herb.) but the whole 
species (placed by Fries, as by Koerber, among the Lecanorei) Fr., was 
first recognized as properly lecideine by Nylander (Prodr.). —— Compar- 
able with the last is yet the well-characterized B. glebulosa, Fr. (Zw. exs. 0. 
78. B. Wallrothii, Koerb.) observed, in this country, only (on the earth, 
thinly covering rocks) in California (Mr. Bolander).——Much more com- 
mon is B. decolorans (Hoffm.) Fr., of our mountains (Tuckerm. ezs. n. 
45) but its range is northern, and I am not acquainted with it south of 
Pennsylvania (Dr. Michener).——The nearly akin B. flexuosa, Fr. Summ., 
occurred on charred surfaces of white pine logs in the White Mountains ; 
and is perhaps common on rails; I have observed it southward as far as 
Maryland. —— B. viridescens (Schrad.) Fr., may be considered as con- 
necting this little assemblage with the one immediately following, and 
occurs commonly (on rotting logs) in the lower forest of the White 
Mountains, as also in swamps in western Massachusetts; and Mr. Frost 
has sent it from Vermont; as Mr. Austin from New Jersey. 
The northern forms of the group of which B. vernalis (as here under- 
stood) may be taken for a representative, have been especially studied, 
but the group extends into the tropics, and reaches there indeed its 
maximum of development. Among tropical representatives of B. ver- 
nalis may be named particularly B. cinereo-rufescens, B. letior, and 
B. subvernalis (Lecidee, Nyl.) and B. luteo-rufula (Lecidea, Tuck.) all 
put the last of which are published in Wright’s Lichenes Cube ; but the 
head of the whole group is the elegantly various B. parvifolia (Pers.) 
(Tuck. Obs. Lich. 1. ¢. 5, p.272) of which not a few forms (n. 179-186) are 
also to be found in Wright’s collection. This species often curiously 
counterfeits Pannaria, and was referred to that affinity by Montagne 
