1886.] BOTANICAL GAZETTE. i) 
read in March, 1840, vol. iii. pp. 281-305; “Further notice of 
some N. E. Lichens,” read in March, 1841, vol. iii. pp. 438-464 ; 
“A further notice of some alpine and other lichens of New En- 
gland,” vol. v. pp. 93-103, January, 1845. These papers give the 
first notices of the alpine lichen flora of the White mountains, 
and contain an account of the systematic classification of lichens 
up to that time, as developed in the writings of Linneus, Achar- 
lus, Fries and others. In “Observations on some interesting 
plants of New England,” in Am. Jour. Science, xlv (1843), 27-49, 
he mentions two lichens, one of which has not, however, held its 
place as a species. In 1845 at Cambridge appeared “An Enu- 
meration of North American Lichens.” The first part of this little 
work is an essay on the natural systems of Aken, Fries an 
licher, which is followed by a general view of the structure of 
lichens and an enumeration of those of North America, arranged 
according to the Friesian system. The “ Synopsis of the Lichens 
of New England, the other Northern States and British America,” 
Cambridge, 1848, was the first full descriptive list of our lichens 
published in this country. It enumerates and describes 295 spe- 
cies of which twenty are new. 
n Lea’s “ Catalogue of the plants of Cincinnati,” Philadelphia, 
1849, is a list of 53 lichens arranged by Prof. Tuckerman. In 
Agassiz’s “ Lake Superior,” Boston, 1850, is a list of seventy-one 
lichens arranged by hi 
pinions in regard 
system. In the Am. Jour. Sci, 1. xxv. 422-430 (May, 1858) and 
Xxvill. 200-206 (Sept., 1859), were two supplements to an “ Enu- 
