Corm
The cormus (borrowed from the Greek κορμός kormós "trunk, block, stick" in the 19th century ) is the multicellular body of vegetation of a plant, which is divided into stem axis , leaf and root . Plants at this level of organization were also called cormophytes in the past . This term is ambiguous, as cormophytes is also an outdated systematic term that includes the mosses , but which do not have a corm.
The plants with corm include all recent vascular plants , i.e. bear moss plants , ferns and seed plants . It is characteristic of the corm that leaves always arise on the shoot axes, never on the roots. The formation of side roots takes place from inside the root (endogenous), while the formation of the side shoot is completely different.
The term Cormus was first used by Carl Ludwig Willdenow in 1802 for all shoot-like organs, including petioles and moss stems. However, mosses do not have a real corm, their leaflets and stems are classified as thallus .
supporting documents
- Gerhard Wagenitz : Dictionary of botany. The terms in their historical context . 2nd expanded edition. Spectrum Academic Publishing House, Heidelberg / Berlin 2003, ISBN 3-8274-1398-2 , p. 178 .
- Peter Sitte , Elmar Weiler , Joachim W. Kadereit , Andreas Bresinsky , Christian Körner : Textbook of botany for universities . Founded by Eduard Strasburger . 35th edition. Spektrum Akademischer Verlag, Heidelberg 2002, ISBN 3-8274-1010-X , p. 148-151 .
Individual evidence
- ↑ http://www.spektrum.de/lexikon/biologie-kompakt/kormus/6634
- ^ W. Zimmermann: Phylogenie der Pflanzen . 2nd edition, G. Fischer, Stuttgart 1959, p. 95 (without ISBN)