CHAP. III. LIXUM FLAVUM. 90 



the short-styled; the stigmas are longer and the 

 papillae coarser. In the short-styled form the stigmas 

 diverge and. pass out between the filaments, as in the 

 previous species. The stamens in the two forms differ 

 in length; and, what is singular, the anthers of the 

 longer stamens are not so long as those of the other 

 form; so that in the short-styled form both the stigmas 

 and the anthers are shorter than in the long-styled 

 form. The pollen-grains of the two forms do not differ 

 in size. As this species is propagated by cuttings, 

 generally all the plants in the same garden belong to 

 the same form. I have inquired, but have never heard 

 of its seeding in this country. Certainly my own plants 

 never produced a single seed as long as I possessed 

 only one of the two forms. After considerable search I 

 procured both forms, but from want of time only a few 

 experiments were made. Two plants of the two forms 

 were planted some way apart in my garden, and were 

 not covered by nets. Three flowers on the long-styled 

 plant were legitimately fertilised with pollen from the 

 short-styled plant, and one of them set a fine capsule. 

 Xo other capsules were produced by this plant. Three 

 flowers on the short-styled plant were legitimately 

 fertilised with pollen from the long-styled, and all 

 three produced capsules, containing respectively no 

 less than 8, 9, and 10 seeds. Three other flowers on 

 this plant, which had not been artificially fertilised, 

 produced capsules containing 5, 1, and 5 seeds; and 

 it is quite possible that pollen may have been 

 brought to them by insects from the long-styled plant 

 growing in the same garden. Nevertheless as they 

 did not yield half the number of seeds compared with 

 the other flowers on the same plant which had been 

 artificially and legitimately fertilised, and as the short- 

 styled plants of the two previous species apparently 



