Definition of Parastichy. Meaning of Parastichy. Synonyms of Parastichy

Here you will find one or more explanations in English for the word Parastichy. Also in the bottom left of the page several parts of wikipedia pages related to the word Parastichy and, of course, Parastichy synonyms and on the right images related to the word Parastichy.

Definition of Parastichy

Parastichy
Parastichy Pa*ras"ti*chy, n. [Pref. para- + Gr. ? a row.] (Bot.) A secondary spiral in phyllotaxy, as one of the evident spirals in a pine cone.

Meaning of Parastichy from wikipedia

- Parastichy, in phyllotaxy, is the spiral pattern of particular plant organs on some plants, such as areoles on cacti stems, florets in sunflower heads...
- Detail of the saucer plant, Aeonium tabuliforme, showing the multiple spiral arrangement (parastichy)...
- lateral view Flight through the μCT image stack, top view Conifer nuts Parastichy Rushforth, Keith (1987-01-01). Conifers. London: Christopher Helm Publishers...
- 1830, Karl Friedrich Schimper and Alexander Braun discovered that the parastichies (spiral phyllotaxis) of plants were frequently expressed as fractions...
- Available space theory Decussation Fermat's spiral L-system Orixa ****onica Parastichy Plastochron Repulsion theory Three-gap theorem Sphere ****ng in a cylinder...
- ISBN 978-0-521-40482-2. Retrieved 31 January 2011. fibonacci ****ng efficiency. "Parastichy pair(13:21) of CYCAS REVOLUTA (male) florets_WebCite". Archived from the...
- separating the individual primordia, with the Fibonacci angle giving the parastichy with optimal ****ng density. Mathematical modelling of a plausible physical...
- phyllotaxis, the arrangement of leaves on a stem, and in the arrangement (parastichy) of other parts as in composite flower heads and seed heads like the sunflower...
- Richards, Philos. Trans. R. Soc. London, Ser. B 235, 509 (1951). Orthostichy, Parastichy and Plastochrone Ratio in a Central Theory of Phyllotaxis v t e...
- Doyle spiral is called a parastichy and the arm counts of the Doyle spiral are called parastichy numbers. When the two parastichy numbers p {\displaystyle...