360 Scientific Intelligence. 
8.:Martius: Flora Brasiliensis ; fase. 86, 37, 38. fol. Dec. 1864.— 
The Gesneracee, by Dr. Hanstein, the curator (succeeding the late Dr. 
Klotszch) of the Berlin Herbarium; with eleven plates. The Salsolacee 
with much ability. A. G 
4. The Journal of the Linnean Society, No. 31 (Dee. 1864), is es- 
pecially rich in articles upon Dimorphism and even Trimorphism in 
on the Fecundation of Orchids, and their Morphology, by the 
late Dr. Cruger, Director of the Botanical Garden, Trinidad ; Catasetum 
and Stanhopea being the principal subjects, and the conclusions of Mr, 
Darwin being fully confirmed. 2. Dimorphism in the Flowers of Mono- 
choria vaginalis, by Dr. Kirk. The additional kind of flower would 
seem to be somewhat after the fashion of that of Utricularia clandestina, 
and arranged for self-fertilization. 8. On the Individual Sterility and 
Cross-Impregnation of certain species of Oncidium, by Mr. John Scott. 
He shows by experiment “that the male element of O. microchilum will 
fertilize the female element of the two distinct species, O. ornithor 
chum and O. divaricatum cupreum, and yet be completely impotent 
upon its own female element; nevertheless, the susceptibility of the latter 
"(female element) to fertilization is shown by its fertile unions with another 
individual of the same species, and likewise by a fertile union with an 
individual of a distinct species ;” and the same is true F microchilum. 
4. Notes on the Sterility and Hybridization of certain species of P ia 
flora, Disemma, and Tacsonia, by the same author. Species which, 18 
cultivation, are perfectly sterile upon the application of the pollen to the 
pistil of the same individual, are readily fertilizable by the pollen of go 
1K 
wise potent upon such individuals; although in hybridization the influ- 
; ; ; : 
fails to develop. And there are two species of Tacsonia, the pollen 
ene of which causes the ovary and even the seed-coats of 
develop, but never the embryo, while conversely the effect is sometimes 
the same, but generally nothing at all. Although general 
should be hesitatingly drawn from limited experiments upon cul 
plants, yet the known facts conspire to show that no sharp line is — 
mm nature between fertility and sterility in crosses. 5. the Seru 
Relations of the three forms of Lythrum Salicaria, by Charles Darwin. 
Here we have the results of au investigation which Mr. Darwin has before 
