648 NATURAL HISTORY MISCELLANY. 
Mitchella repens, in which he pointed out that these plants, though 
apparently hermaphrodite, had the stamens and pistils of different 
characters in separate plants, and were therefore subject to the 
laws of cross-fertilization as indicated by Darwin. He had had 
his attention called to the Bouvardia, by Mr. Tatnall of Wilming- 
ton, Del., as furnishing a similar instance to that of Epigwa and 
Mitchella, belonging to the same natural order in which the Cincho- 
neous division of the Rubiaceæ, Bouvardia, was placed. | These 
had some plants with the pistils exserted, while in others only the 
stamens were visible at the mouth of the corolla tube. Mr. Tatnall 
had not had the matter suggested to him early enough to say that 
it was so in all cases; but he believed that these flowers, which 
practically might be termed pistillate and staminate, were found 
entirely on separate plants. This is a very important fact, as 
Bouvardia is not raised from seeds in green-houses, but from 
cuttings of the roots, and therefore, all these plants with separate 
sexes must have been produced from one original individual, with- 
out the intervention of seed, and thus confirm the position ad- 
vanced in a previous paper on “ bud variations,” namely, that va- 
riations in form, and, by logical inference, new species, may arise 
without seminal intervention; and that in this way identical spe- 
cies may appear in separated localities without the necessity of 
supposing an emigration from one small point, as Darwinism now 
does. 
In the specimens of Deutzia gracilis were two forms of flowers 
on the same plant. Besides the large ones with stamens and pis- 
tils apparently perfect as generally seen, there were numerous 
small flowers in which the petals were only partially developed. 
The filaments were entirely wanting, but the anthers were as per- 
fect, if not larger than in what we should call the perfect flowers. 
Any one could see that these small flowers were the result of de- 
ficient nutriment, and would be apt to pass the matter over with 
this simple reflection; but he wished to emphasize the fact that 
this defective nutrition rendered the female organs inoperative, 
while the male organs were still able to exercise their functions; 
thus affording another instance, if any more be needed, of the 
truth of his theory of sex, namely, that with defective nutrition, 
the female sex is the first to disappear ; and that only under the 
highest conditions of vitality is the female sex formed. 
In the case of the Bowvardia a similar law was seen. The 
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