1886.] BOTANICAL GAZETTE. 77 
should be the guide of future students of this difficult class of 
lants. 
It now remained for Tuckerman to embody his ideas in a de- 
seriptive work including all the North American lichen flora, 
the first part of this work “A synopsis of the North American 
Lichens comprising the Parmeliacei, Cladoniei and Ceenogoniei,” 
pp- xx. 262, was published in Boston in 1882. In this work his 
conservative views in regard to species, and his admirable faculty 
of bringing together allied plants and showing their relations, are 
finely exhibited ; while the descriptions are models of clearness 
and conciseness, and have not their equals in the English or any 
other language. But this work was destined to remain incom- 
plete. His health began to fail, he frequently became discour- 
aged, he suffered the demands of others upon his time to divert 
him from its regular purpose, and he felt pained at the absolute 
want of public recognition abroad of his first part. But still he 
labored on as long as possible, up to within a few months express- 
ing his determination to go on. But it could not be, and his mon- 
ument is incomplete, though it is to be hoped that some portion of 
his manuscript may be in a condition that will enable it to be is- 
sued in a final supplement. : 
only remains to notice some minor lichenological publi- 
cations: 
Can lichens be determined by ckemical tests? American 
peiaet, il, 104-107 (1868), takes the negative side of the ques- 
lon. 
__A catalogue of plants growing without cultivation within thirty 
miles of Amherst College, by Edward Tuckerman and Charles C. 
rost, Amherst, 1875, lichens, pp. 5 ‘ : 
The question of the gonidia of lichens, Am. Jour. of Science, 
III. xvii. 254-256 (1879), in which reference is made to the dis- 
coveries of Dr. Minks, in regard to the microgonidium, which he 
regarded as firmly established, and as deciding the question as to 
the autonomy of lichens. ‘ 
_ Lichens of the Howgate Polar Expedition of 1877-78, Wash- 
ington 1879, pp. 167, 168. ek. ~ 
Two lichens of Oregon (Sticta Oregana and Rinodina Hallii), 
Bull. Torr. Bot. Club, v. 20 (1874). ‘ : 
___ , Lecidea elabens, Flora, 1875, pp. 63, 64, an exclamation against 
this name being attached to Lecidea melancheima Tuckerm. 
ea of Kerguelen’s Land, Bull. Torr. Bot. Club, vi, 57 
Be i 
__ U.S. Exploration of the 40th parallel, Washington 1872, 
lichens, p. 412. 
