48 Observations on depriving Flowers of their Anthers. 



8. Simple Gillyflowers, from seeds of artificial, deprived flowers, 

 displayed sometimes an irregular shaped corolla ; instead of four, 

 only three petals ; and instead of six stamens, only three on one side 

 of the corolla. 



9. The color remained, as well in single as in double ones. 



10. The odor seems to be augmented In double flowers. 



11. Manure has some effect on the multiplying of flowers; how- 

 ever, not so many flowers are then produced, in the Cheiranthus an- 

 nuus; the whole plant rather becomes more strong and luxuriant. 

 Often the manure of pigeons, and powdered bones, has the effect of 

 imparting white spots to colored flowers. 



12. On Cheiranthus incanus, (Stockflower,) it has the same effect, 

 and in that plant the seeds seem to differ too in proportion, so that 

 the weight of one thousand ordinary seeds amounted to 33 grains, 

 and one seed about .033, or near -^-^ gr. ; the same number of seeds 

 of double flowers 30 to 33 grains, or single seeds gV to sV g^"* 



These experiments show, that this formation of double flowers, 

 produced by depriving the flowers of their anthers, agrees well 

 with the theory of sexuality. The usual fructification is only dis- 

 turbed, but not immediately destroyed ; the imperfect seed is still 

 formed ; the plants raised from them display, instead of the organs 

 of sexuality, a multitude of petals, where the ability of production is 

 manifested. 



The experiment I made with Nicotiana Langsdorfii and N. pani- 

 culata, can be connected with it. I deprived the former of the sta- 

 mens, and fixed the pollen with a quill on the stigma of the latter, 

 which produced, by sowing the seed the next year, quite a different 

 plant — a medium between both. Dr. Gaertner made an experiment 

 of this kind with Nicotiana glutinosa and N. suaveolens, which pro- 

 duced a variety with a multitude of beautiful red blossoms. It is to 

 be wished, that similar experiments may be made in this country,, 

 with different plants and in different places. 



