Note 28 — EXPERIMENTS IN PLANT-HYBRIDISATION23.
Reading edition
[In my account of these experiments (R.H.S. Journal, vol. xxv. p. 54) I misunderstood this paragraph and took “axis” to mean the floral axis, instead of the main axis of the plant. The unit of measurement, being indicated in the original by a dash (′), I carelessly took to have been an inch, but the translation here given is evidently correct.]