Epinasty (2.1.2009)

Definitions of Epinasty on the Web:

• the downward curvature of leaves etc due to differential growth rates
  en.wiktionary.org/wiki/epinasty

• downward curvature of a leaf, leaf part, or stem.
  www.hortnet.co.nz/publications/hortfacts/hf205021/disgloss.htm

• A process by which the growth of branches or petioles is abnormally pointing downward. This phenomenon is caused by the more rapid growth of the upper side. Epinasty may result from either nutritional deficiencies or irregularities at the plant growth regulator level. ...
  www.fao.org/DOCREP/003/X3910E/X3910E08.htm

• Downward curling of a leaf blade resulting from more rapid cell growth on the upper side of a petiole than on the lower side; often a hyperplastic ...
  www.ppath.cornell.edu/glossary/Defs_E.htm

• A downward bending of flower parts or leaves. Epinasty is different from wilting in that the tissues aren’t suffering from lack of water, but ...
  www.agnr.umd.edu/tospo/txt-glossary.html