The Right- and Left-Handedness of Phyllotaxy

Abstract

1. In Pharbitis Nil, the Japanese morning glory, the dimorphic variation of the right- and left-handedness of phyllotaxy occurs equally in ratio and the alternative condition is not inherited. The direction of phyllotaxy is also quite variable in one individual.
2. The equality in the ratio of the dimorphism of phyllotaxy is confirmed in some other plants and it seems to be a general phenomenon in the alternate-leaved plants.