Chap. V. HETEROSTYLED TEIMOEPHIC PLANTS. 193 



shrivelled or contained brown and tough, or pulpy 

 matter, without any good pollen-grains, and they never 

 shed their contents; they were in the state designated 

 by Gartner * as contabescent, which term I will for the 

 future use. In one flower all the anthers were conta- 

 bescent excepting two which appeared to the naked 

 eye sound; but under the microscope about two-thirds 

 of the pollen-grains were seen to be small and shrivelled. 

 In another plant, in which all the anthers appeared 

 sound, many of the pollen-grains were shrivelled and 

 of unequal sizes. I counted the seeds produced by 

 seven plants (1 to 7) in the first lot of eight plants, 

 probably the product of parents fertilised by their own- 

 form shortest stamens, and the seeds produced by three 

 plants in the other two lots, almost certainly the pro- 

 duct of parents fertilised by their own-form mid-length 

 stamens. 



Plant 1. This long-styled plant was allowed during 



1863 to be freely and legitimately fertilised by an adjoining 

 illegitimate mid-styled plant, but it did not yield a single 

 seed-capsule. It was then removed and planted in a re- 

 mote place close to a brother long-styled plant 'So. 2, so 

 that it must have been freely though illegitimately fertil- 

 ised; under these circumstances it did not yield during 



1864 and 1865 a single capsule. I should here state that a 

 legitimate or ordinary long-styled plant, when growing 

 isolated, and freely though illegitimately fertilised by in- 

 sects with its own pollen, yielded an immense number of 

 capsules, which contained on an average 21.5 seeds. ' 



Plant 2. This long-styled plant, after flowering during 

 1863 close to an illegitimate mid-styled plant, produced 

 less than twenty capsules, which contained on an average 

 between four and -five seeds. When subsequently growing 

 in company with No. 1, by which it will have been illegit- 

 imately fertilised, it yielded in 1866 not a single capsule, 

 but in 1865 it yielded twenty-two capsules: the best of 



'Beitrage zur Kenntuiss der Befruchtuug,' 1S44, p. 116. 



