Note 11 — Chapter IX · SENSITIVENESS OF PLANTS TO LIGHT: ITS TRANSMITTED EFFECTS.
Reading edition
Sachs has made some striking remarks to the same effect with respect to the various stimuli which excite movement in plants. See his paper ‘Ueber orthotrope und plagiotrope Pflanzentheile,’ ‘Arb. des Bot. Inst. in Würzburg,’ 1879, B. ii. p. 282.