108 Scientific Intelligence. 
they are truly distinct species, which do not sensibly vary. One aly 
exhibits green stems and pure white flowers; the other, dark-pw 
mediate between the two species in the colorati f the stems a 
flowers. They had, however, the peculiarity of a gigantic size, attain 
at the first forkings of the stems, The later flower-buds opened, howevehy 
and were perfectly fertile, the pods being as large and as full a 
seeds asthoeof either parent. In 1861, these seeds (of Stramonio-Ta 
were sown, and produced a second generation Jike the first. ds 0 
this crop were sown in 1862, and twenty-two seedlings were preserve 
i D. Stramonium in all 
turned as 
completely to D. Tatula as the five did to D. Siramonium. Two ot 
seemed te be D. Tatula, and were equally reduced in size and fertile from 
the first forks, but they still showed in their paler coloring a trace of BG 
other ancester. The remaining six of the twenty-two showed somewhat 
more of it, both in eoler and in the tallness and lateness.of fructification 
expressed numerically, Naudin estimates that they were, say, nine-tel 
D. Tatula D. Stramonium. “ Here, then,” says Nat 
din, “is a hybrid completely intermediate between the two parent 
which, left to itself, feeundated by its own proper pollen, is spentan 
evered at the second generation, dividing its offspring between 
two species, It is to be remarked that the division is very wneq 
D. Tatula taking: the lion’s share, totally or nearly reclaiming seve 
individuals out of the twenty-two. This unequal division is comme 
> oie and Paap goes to the extreme, one of the parents ee 
isappearing from the hybrid progeny, which thus es over entirel 
the other species,” ADEN mr 8 
As to crossing species and their hybrids, in view of obtaining dive 
and particular varieties, Nandin shows, accordingly, that, to obtam ™ 
desired results, the hybridizer should take pains to cro ose I 
which tend toward-one parent with those which tend to the o 
moh: 
= & 
gator, the late Louis Vilmorin. 
ae Flora of the British West Indian Islands ; by A. H. R. GriseBs 
otany in the University of Gottingen. London, 
& Co. &vo, parts VI and VII, 1864.—These parts, extem 
0 ip. 789, complete this most valuable work, which 
closes with the Vascular Cry ptogamia. ul, 
