REPRODUCTIVE ORGANS IN THE PRIMULACEX. 8 
as to the relative structure of the sexual organs of these species, 
and this the more especially because a few of them will come 
under special treatment in the sequel. I will here, therefore, 
` simply remark, that the individual characteristics of all the above 
species, with two exceptions, were so decided as to leave no doubt 
as to which form they should be referred. The species which 
presented the exceptions were the P. pusilla and P. floribunda, 
in both of which along with normal “short-styled” forms I have 
observed an individual with stamens and pistils of an equal 
length. I have only seen six specimens of P. pusilla, five of 
which had the anthers surrounding the mouth of the corolla-tube, 
the pistil about half the length of the latter. In the other speci- 
men the anthers were similarly attached, but in this case the 
stigma reached their base. The case of P. floribunda is exactly 
similar, one specimen having the stamens and pistils of an equal 
length; the others were * short-styled"—the anthers reaching the 
mouth of the corolla-tube, the pistils about half the length of the 
latter. 
These lists then show us that “ dimorphism” is a very general 
characteristic of the sexual organs of the species of Primula ; it 
is not, however, universal, as Mr. Darwin informs me Prof. Tre- 
viranus has stated (Bot. Zeit. 1863, p. 4) on the authority of 
Koch and Tausch. This will be seen by referring to the fourth 
of the above lists, where the names are given of those species 
presenting, from personal observations, no structural dimorphism, 
stamens and pistils being of an equal length. I had no intention 
of entering into special details as to the relative structure of the 
sexual organs in these species; since the above diametrically 
opposite assertion, however, has been made, I cannot thus sum- 
marily pass them over. I will therefore give a brief account of 
the relations of the anthers and stigmas in each. 
First, Primula elata.—Of this species a single specimen only 
has come under my observation. In it the stamens are attached 
immediately below the mouth of the corolla-tube, anthers in- 
cluded ; the stigmas in a number of the flowers reach the middle, 
in the others the base of the anthers. 
Second, Primula longiflora.—In this species the anthers in- 
variably surround the mouth of the corolla-tube, the stigmas 
either very slightly exserted, or more frequently of an equal 
length with the anthers. 
Third.— Primula mollis differs from its immediate allies the 
P. Sinensis and P. cortusoides (truly dimorphic species) in pre- 
