

Chap. V. HETEROSTYLED TRIMORPHIC 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 No. 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 fire 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 Kenntniss der Befruchtung,' 1844, p. 116. 



