Botany. | 645 
- probably only a short distance behind the tip. The end in this 
case was not found. The twisting increases the chances of a 
single tube not holding together when subjected to the razor or 
needles of the investigator. j 
All of the parts of the illustration were drawn with a camera 
lucida—a Grunow, which thus far has proved itself among the 
best. The tubes c dand f hold the same positions to each 
other.as they did in the conductive tissue of the style. „This was 
an unusually rich spot in odd forms. The conductive tissue 
seemed loose, and there was no apparent cause for any change of 
direction or the formation of enlarged end.. No nucleus was ob- 
served in any of the tuber-like tips. I hope to cultivate the pol- 
len free from any tissue and observe the results —B. D. Halsted, 
Botanical Lab, A gricul. Coll., Ames, lowa. 
Books on Funci—The American student of fungi is often 
sorely puzzled for want of a systematic manual to aid him in his 
study and classification of the multitude of species which he 
collects or might collect if he could hope to do anything with 
them. The book which has been of most service is probably 
Cook’s Hand-book of British F ungi, published about fifteen years 
ago, but its descriptions are so imperfect and the system of classi- 
fication so antiquated that from the first it has been an exasper- » 
ating book to use or to put into the hands of students. Of American 
books there are none. We have some local lists and a good many 
Scattered papers. Dr. Farlow has given us excellent monographs 
of several genera, Mr. Peck has likewise published many descrip- 
tions and a number of monographs. Mr. Morgan has helped us 
4 by giving us his Mycologic Flora of the Miami valley, Ohio. Ellis 
a and Everhart have published monographs of a number of genera. 
a Y Securing complete sets of Grevillea, the Torrey Bulletin, Bo- 
tanical Gazette, Fournal of Mycology, AMERICAN NATURALIST and 
Proceedings of several scientific societies, and in addition the. 
reports and bulletins issued by various States and colleges, one 
afford to Supply themselves with all these ? ey 
Two beoks now publishing*will do much to help the ordinary 
botanist and botanical student. Several years ago Dr. George 
Wi iter began the publication of a new edition of the volume 
Die Pilze” (fungi) of Rabenhorst’s Kryptogamen-Flora von 
Deutschland, Oesterreich und der Schweiz. The first book of 
“MS work was completed in 1 
‘Setes, Saccharomycetes and Basidiomycetes. Ro 
ao — tdance with Winter’s views, is made to include the Entomoph- e 
; es : as ` eV: € ES ; 
si Oomycetes. From present indications this book at least will 
* Tequired fr the Ascomycetes, and a third book will be neces- 
P 
do something, but how many, aside from the specialists, can 
