128 Scientific Intelligence. 
Ill. Borany anp Zoo.oey. 
1. Martius, Flora Brasiliensis: fasc. XII. Dec., 1853. (folio. 5 
This part of Professor Martius’s elaborate Flora of Brazil, which h 
een long in reaching us, comprises the Urticinea, which are slaborated 
by Prof. Miquel of Amsterdam, who had already we ae an excellent 
and much-needed monograph of the Fig tribe. e leased to 
ty every kind of intermediate form that, in Prof. Migeels opinion, 
they are not to be definitely separated. His Urticineew accordingly 
embrace four suborders, viz,—the nore ia (including Moree), the 
Ulmacee, the Urticee, and the annabine All but the last of these 
16 genera and a large number of species; the Ulmacew by Celtis and 
Sponia; and the Urticinee by 6 genera. The descriptions are fi 
trated by 45 elaborate folio plates A. 
The non-assimilation of Nitrogen by Plants.—M. Bovssta0is 
has published, in the Annales des Sciences Naturelles, 4th ser., tom. i, 
o. 4 and 5, the details of an interesting and well-devised investigation 
upon the vegetation of several plants, of different families, from whic 
ammonia and all azotized organic matter were excluded ; and he finds 
that under these conditions there is no more nitrogen in iz resulting 
s ng t 
assimilated by plants in such cases. Another memoir is promise 
illustrating the conditions under which this element is assimilated on 
plants are grown in a sterile soil in the open air. 
. a we in.—The sorpnecl on the bracts and ovaries of AB “Hop, 
acorn surrounded below by its cup. The account of these corpuscles 
hs hypo by Raspail appears to have ‘little more » faeaae in fact ae 
A. 
a incainalit l, aches who discovered the two Eads of organs 08 
the prothallia, or seed-leaves of Seunineting Ferns, affirmed that he 
had seen the the moving spiral spermatozoids, of the anthe- 
