Rosette plant

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Example of a whole rosette plant: Erophila verna

A rosette plant is an herbaceous plant in which all or most of the leaves at the base of the stem are pressed together to form a rosette . This is due to a failure to stretch the individual sections ( internodes ) of the stem axis , which means that it is compressed.

For the definition of the rosette, the shape of the leaves - stalked or seated - is irrelevant, as is their orientation (whether upright or close to the ground).

The formation of a base rosette enables the plants to produce their substance in the warmer air layer close to the ground. This growth form is common in plants in high mountains and in the Mediterranean climate. Rosette-less plants, on the other hand, are more common in summer-damp, winter-cold deciduous forests.

Rosette plants often have sprout roots, while the primary root is often lost (secondary homorhizia ).

Whole rosette plants

Whole rosette plants or fully rosette plants have no further leaves outside the rosette, so the stem is a leafless stem.

Examples are the primroses ( Primula ) or the genus Taraxacum .

Semi-rosette plants

Semi-rosette plants also have leaves on the stem.

An example is the forest hawkweed ( Hieracium sylvaticum ) or the compass lettuce ( Lactuca serriola ).

Erosulate plants

Plants without a rosette are called erosulate. They only have leaves on their elongated axes. These are roughly all creeping plants.

supporting documents

  1. ↑ a b c 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. 47.
  2. ^ Manfred A. Fischer , Karl Oswald, Wolfgang Adler: Excursion flora for Austria, Liechtenstein and South Tyrol. 3rd, improved edition. State of Upper Austria, Biology Center of the Upper Austrian State Museums, Linz 2008, ISBN 978-3-85474-187-9 , p. 64.
  3. ^ A b c Werner Rothmaler: Excursion flora from Germany. Volume 4. Vascular Plants: Critical Volume . 10th edition, Elsevier, Munich 2005, ISBN 3-8274-1496-2 , p. 451.
  4. ↑ Wilhelm Troll: Practical introduction to plant morphology. First part: the vegetative structure . Gustav Fischer Verlag, Jena 1954, pp. 34–40.
  5. ^ A b c Manfred A. Fischer, Karl Oswald, Wolfgang Adler: Excursion flora for Austria, Liechtenstein and South Tyrol. 3rd, improved edition. Province of Upper Austria, Biology Center of the Upper Austrian State Museums, Linz 2008, ISBN 978-3-85474-187-9 , p. 1295.