As zygomorph (from the Greek ζυγόν, zygon, (ox) yoke, and μορφή, morphé, shape), dorsiventral or monosymmetric also enantiomorphic or mirror-symmetrical, bilaterally symmetrical, in botany flowers are referred to, which consist of two mirror-like halves ( bilateral Symmetry ) exist, i.e. have only one plane of symmetry . The different (asymmetrical) structure of the underside and upper side on the body of animals is also called " dorsiventral ".
Zygomorphe blooms occur especially in those plants families , which to certain pollinators are adapted ( Eutropie ), especially when adapted to pollination by bees ( Melittophilie ) and birds ( ornithophily ).
The term was introduced by Alexander Braun around the middle of the 19th century.
- Gerhard Wagenitz : Dictionary of botany. The terms in their historical context. 2nd, expanded edition. Spektrum Akademischer Verlag, Heidelberg / Berlin 2003, ISBN 3-8274-1398-2 , p. 318.
- Dorsiventral . In: Lexicon of Biology . Spektrum Akademischer Verlag, Heidelberg 1999 ( online [accessed October 3, 2016]).
- Manfred A. Fischer , Wolfgang Adler, Karl Oswald: Excursion flora for Austria, Liechtenstein and South Tyrol. 2nd, improved and enlarged edition. State of Upper Austria, Biology Center of the Upper Austrian State Museums, Linz 2005, ISBN 3-85474-140-5 .