Flask (botany)

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Piston, schematic representation

In botany , a cob (often referred to as a spadix ) is an inflorescence or fruit cluster . It is characterized by a roller shape with a thickened main axis. The flowers and later the fruits sit directly on without a stem. If there is only a very short piston due to a slight increase in length, the difference to a head is fluid.

Examples can be found in maize , certain types of millet , calamus and arum plants .

Male and female pistons in cattails schematically

In the cattail genus , an upper section of the inflorescence is purely male and separated from the purely female inflorescence below by a species-specific long stem section. Both the male and female parts are thickened and called cobs (the female inflorescence can also be divided into two cobs), with the female being the more noticeable, thicker ones. The entire inflorescence is also referred to as a piston with male and female "piston parts". In the narrow-leaved cattail, the male piston is further subdivided into "partial pistons".

Web links

Commons : Pistons (Spadix)  - Collection of images, videos and audio files
Wiktionary: piston  - explanations of meanings, word origins, synonyms, translations

Individual evidence

  1. a b Cattail profile. Cattail section identifying features . In: teichpflanze-teichbau.com. Retrieved July 23, 2019 .
  2. a b c Norbert Gäng: Oxygen dynamics in the root space of Typha angustifolia . Dissertation. Ulm University , Ulm 2006, DNB  995413002 , 2.1 Characterization of the examined species Typha angustifolia , p. 11 ( online at DNB [PDF; 2,3 MB ]).
  3. a b Peter Schröder: Cattail perennial marsh plant and bank plant. In: Floristik24 - The garden LEXICON of the plant families. Retrieved July 23, 2019 .
  4. Otto Schmeil : Guide to botany. An auxiliary book for teaching at higher educational institutions . 1st edition, reprint of the 112th edition by Quelle & Meyer , Leipzig 1924. Salzwasser-Verlag , Bremen 2009, ISBN 978-3-86195-037-0 , p. 179 ( limited preview in Google Book Search [accessed on July 24, 2019]): "The flowers are arranged in 2 pistons standing on top of each other, of which the lower only contains pistils, the upper only stamens."
  5. Franz Thonner: Exkursionsflora of Europe. Instructions for determining the genera of European flowering plants . R. Friedländer, Berlin 1901, OCLC 4950387 , section Fam.Typháceae, Cattail plants , p. 4th f . ( Preview of a reprint in Google Book Search [accessed July 24, 2019]): "Inflorescence consisting of 1 upper ♂ and 1–2 lower ♀, cylindrical, densely-flowered pistons supported by narrow, derogatory sheaths."
  6. Rudi Beisser: Edible wild herbs and wild berries for on the go . Franckh-Kosmos , Stuttgart 2014, ISBN 978-3-440-14510-4 , section Broad-leaved cattails ( limited preview in the Google book search [accessed July 23, 2019]).