13] Proceedings of Section G, A. A. A. S. 337 
Hayden Survey for 1872. The conclusion was reached that 
the Black Hills lichens are of northern mainly subalpine char- 
ater, and while more closely allied to the ‘Rocky Mountain 
fora, are intermediate between that and the flora of eastern 
| Nebraska. The varying preponderance of tree, rock, and 
arth forms was attributed to certain geological and climatic 
conditions, 
i. J. CHRISTIAN Bay: The bibliography of American 
botanical iiterature.—Attention was called to the advantages 
which would come from the publication of an index of Amer- 
“awritings. Mr, Bay instanced the great value of the index of 
themical literature conducted under the auspices of the As- 
“tiation. He offered the suggestion that Section G (Botany) 
_ Point a committee to undertake the work. 
veral members discussed the subject, but all thought that 
vas need of taking more time to fully consider the mat- 
w/atia Douglasic. —The material for study was obtained 
that th the author's recent visit to Hawaii. It was claimed © 
those of Equisetum. The archegonia are onthe 
*, and in its development the embryo retains its direct 
) ic. and bursts through the prothallium which 
Anos “rounding the base of the plantlet probably for 
*Poroph ea continuing to do vegetative work after the 
* independent. The development of the 
S discussed, and the transition between 
bryophytes and that of pteridophytes 
€ whole structure was taken to indicate the 
f Marattia, and the author regarded it as 
| ching th to the liverworts yet examined, especially 
i Discussed my Anthocerotez, 
tein, ¥ Mrs. Britton and Messrs. MacMillan and At- 
BM, 
the auth, HOMAS The roots of orchids.—In the absence 
Lig pec Paper was read by title. 
Netra of apg Preliminary notes on some chromogenic 
Per Ames flova.—In the absence of the author the 
fad by title 
