34 HETEEOSTYLED DIMOM-HIC PLANTS. Chap. I. 



nximber is probably much too bigh, as many of the seeds 

 produced by the illegitimately fertilised long-styled 

 flowers were so small that they probably would not 

 have germinated, and ought not to have been counted. 

 Several long-styled and short-styled plants were pro- 

 tected from the access of insects, and must have been 

 spontaneously self-fertilised. They yielded altogether 

 only six capsules, containing any seeds ; and their 

 average number was only 7"8 per capsule. Some, 

 moreover, of these seeds were so small that they could 

 hardly have germinated. 



Herr W. Breiten^ach informs me that he examined, 

 in two sites near the Lippe (a tributary of the Ehine), 

 894 flowers produced by 198 plants of this species ; and 

 he found 467 of these flowers to be long-styled, 411 

 short-styled, and 16 equal-styled. I have heard of no 

 other instance with heterostyled plants of equal-styled 

 flowers appearing in a state of nature, though far from 

 rare with plants which have been long cultivated. It 

 is still more remarkable that in eighteen cases the 

 same plant produced both long-styled and short-styled, 

 or long-styled and equal-styled flowers; and in two 

 out of the eighteen cases, long-styled, short-styled, and 

 equal-styled flowers. The long-styled flowers greatly, 

 preponderated on these eighteen plants,— 61 consisting 

 of this form, 15 of equal-styled, and 9 of the short- 

 styled form. 



Peimula vulgaeis (var. aeauUs, Linn.), 



The Primrose of English Writers. 



Mr, J. Scott examined 100 plants growing near 

 Edinburgh, and found 44 to be long-styled, and 56 

 short-styled ; and I took by chance 79 plants in Kent, 

 of which 39 were long-styled and 40 short-styled ; so 



