70 BOTANICAL GAZETTE [yuLy | 
or phosphate, is a conspicuous example. . 
Whatever the disappointment may be that by this contribution, the ques- 
tion of distribution aside, we are no nearer than before to positive knowl 
edge of the nature of this remarkable symbiosis, it is the presentation of an 
admirable hypothesis of the general function and distribution of mycorhiza, _ 
Supported by a wealth of evidence which subsequent studies are far from 
likely to controvert. To the practical physiological ecologist the lists and , 
detailed discussion of mycorhiza distribution will be found invaluable. 
F 
| 
the economy of the plant, being purely reproductive in purpose and com 
paratively ineffective in that function. The roots, which reproduce the plant, — ) 
Serve as organs of storage, are the habitat of the fungus, the absorbing mem — 
ber of the symbiosis, and are the seat of the chief activities of the plant 
Pterospora shows an interesting exception to the general tendency of shoot 
reduction in its development of a comparatively large branched aerial portion — 
which is supplied with stomata.—J. G. CouLTER | 
39 spp, 14 new), and Monoclea (2 spp.) being included. Re 
(issued April 30) contains an account (with 4 plates) ; at 
€s of Utricularia, by Fr. MEISTER, together _ 
Dovaat, D. T., and Lioyp, E. F.: 
the European speci 
The roots and mycorhizas of some of 
> 419-428. Ig00. 
®Mac 
the Monotropacee : Bull. N. Y. Bot. Garden I 
ra 
i 
a 
