Definition of parastichy in English:

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parastichy

Pronunciation: /pəˈrastəkē/

noun (plural parastichies)

Botany
(In phyllotaxis) an oblique row of leaves arranged in a secondary spiral. Contrasted with orthostichy.
Example sentences
  • There was a negative correlation between phyllotaxy and leaf primordium diameter: species with greater numbers of orthostichies or parastichies had smaller leaf primordia.
  • Curved lines show parastichies between stamens and last-formed tepals.
  • Pistillate flowers, sterile male flowers, atypical bisexual flowers and staminate flowers are inserted on the same contact parastichies.

Origin

Late 19th century: from para-1 'adjacent' + Greek stikhos 'row, rank'.

For editors and proofreaders

Syllabification: pa·ras·ti·chy

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