Note 151 — Chapter XI
Reading edition
The above examples are taken from Rev. G. Henslow's paper on "Self-Fertilisation of Plants," in Trans. Linn. Soc. Second series, Botany, vol. i. pp. 317-398, with plate. Mr. H.O. Forbes has shown that the same thing occurs among tropical orchids, in his paper "On the Contrivances for insuring Self-Fertilisation in some Tropical Orchids," Journ. Linn. Soc., xxi. p. 538.