- 
Geology and Natural History. 237 
the figures, one is given of the striking 4. Brasiliensis, now rather 
common in conservatories. It de Pag that, one of the kinds of 
Guaco, famous antidotes to snake-bites, is furnished by an Aristo- 
lochia, vi zima of Guiana and Venezuela. Fasc. 6 , 
ubli hre 
to general a3 acters, by Hegelmaier. The affinity is still re- 
arded as uncertain; the recent reclamation of Callitrichie to 
the Tieegae is not ee to; still it is thought that the 
C. 
same ‘year a 867), we may, Hie, atte properly retain Engel- 
ma 
e' Onagraces are by M. Micheli of Geneva. The most im- 
portant genus is Jussiwa, with 36 species, under three sections. 
Our northern J. decurrens is one of the species, and is well 
a So is the a8 oocarpa of C, Wright in in Grisebach’s Pi. 
Tota on which a genius, Oocarpon is here established. va 
bium shes) is only. LE. BORE y of Fuschia and ote her 
rises in spring, it is thought yoke peer rhees PE pow y or 
tag acted upon in higher than in lower tasitetes.. "To test 
showing a decided advantage in precocity; while the uncertain or 
varying result of the two other plants tried were attributed to the 
va that being of somewhat variable species they probably repre- 
e forms. It occurred to M. DeCandolle to test the 
mace in a different tad an i 
er ad branches sent him from Montpellier of Populus 
alba, Carpinus Betulus, Liriodendron, C © 
paired with similar branches taken from trees at Geneva; and, 
after 8 common sojourn in a cool room long enough to make sure 
complete penetration by the same irs were 
P in glasses of water, with some sand at bottom, and kept 
in a warmed room under exactly the same conditions. The 
Catalpa requiring a higher temperature to start it, and coming, 
therefore, much later into leaf, was made the subject of a subse- 
