Bud location
As vernation or Verna desk is in botany the position of the leaves , even petals in the bud called. The bud location is often specific for certain kin groups.
A distinction is made between the following types of bud location:
- circinate or spiral: the leaves are curled from the tip to the base. This form occurs in ferns , for example .
- conduplicat or folded: the leaves are folded along their midrib. Examples are rock pear ( Amelanchier ) and liriodendron .
- Corrugat or wrinkled, wrinkled: Examples are the petals of poppies ( Papaver ) and rock roses ( Cistus ).
- contort or twisted: The leaves - especially petals - coincide in one direction like a vortex.
- convolut or rolled: the leaves are rolled up lengthways as a whole. Examples: lilies of the valley ( convallaria ) and bananas ( musa )
- involute or curled up: the lateral areas of the leaves are curled upwards.
- flat or flat: the leaves are flat, neither rolled nor folded.
- plikativ or folded several times: a fan shape about at Alchemilla , about longitudinal fold in the plantains ( Plantago ).
- revolut or rolled back: the lateral parts of the leaves are curled downwards. Examples are the genera of the willow ( Salix ) and the knot oak ( Polygonum ).
- Umbrella-shaped: an example is Podophyllum .
Circinate bud position in the ferns.
Seed poppy ( Papaver dubium ) with wrinkled buds.
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Initially, Carl von Linné used the term folatio , but later vernatio prevailed for the bud layer , even though it was sometimes also used for the process of leaf unfolding.
supporting documents
- 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. 344f.
- Peter Schütt , Hans J. Schuck, Bernhard Stimm (Ed.): Lexicon of tree and shrub species. Special edition. Nikol, Hamburg 2002, ISBN 3-933203-53-8 , p. 552.