Introductory remarks--Description of the twining of the Hop--Torsion of the stems--Nature of the revolving movement, and manner of ascent- -Stems not irritable--Rate of revolution in various plants--Thickness of the support round which plants can twine--Species which revolve in an anomalous manner.英文原著 · 《The Movements and Habits of Climbing Plants》
{6} This whole subject has been ably discussed and explained by H. de Vries, 'Arbeiten des Bot. Instituts in Wurzburg,' Heft iii. 331, 336. See also Sachs ('Text-Book of Botany,' English translation, 1875, p. 770), who concludes "that torsion is the result of growth continuing in the outer layers after it has ceased or begun to cease in the inner layers."英文原著 · 《The Movements and Habits of Climbing Plants》
{10} The mechanism by which the end of the shoot remains hooked appears to be a difficult and complex problem, discussed by Dr. de Vries (ibid. 337): he concludes that "it depends on the relation between the rapidity of torsion and the rapidity of nutation."英文原著 · 《The Movements and Habits of Climbing Plants》