Support sheet
In plants, a bractsheet is a leaf that has a side shoot in its leaf axil . This can be a vegetative side branch (then called Probraktee ), an inflorescence or a single flower ( wrapper or Bractee ) (see diagram). Sometimes all bracts are referred to as bracts (especially in the English-language literature), whereas these are often only understood as bracts of fertile side shoots.
The support sheet may be a germ , a cataphyllary , a fallen leaf or bract be.
Especially in the area of the inflorescence, the bracts are often designed differently than the leaves. In many species the bracts of flowers or partial inflorescences are formed as bracts (= brakteos), that is, smaller and simpler than the leaves.
The English name bract and the French bractée are limited to bract -like bracts .
literature
- 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. 331.
- 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 , p. 73.
- A. Zimmermann : The cucurbitaceae. Issue 2, Gustav Fischer, Jena 1922.
