from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The arrangement of leaves on a stem.
- n. The principles governing leaf arrangement.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. phyllotaxis
from the GNU version of the Collaborative International Dictionary of English
- n. The order or arrangement of leaves on the stem; the science of the relative position of leaves.
from The Century Dictionary and Cyclopedia
- n. In bot., same as phyllotaxis.
Sorry, no etymologies found.
Thus, the leaves in assuming a new phyllotaxy, take one quite analogous to the normal one.
In the adult state it is not always possible to ascertain with certainty to which of these causes the increase in the number of leaves is due, though a clue to the real state of things may be gained from attention to the distribution of the veins, to the arrangement or phyllotaxy of the leaves, the size and position of the supernumerary organs, &c.
This is the leaf-arrangement or phyllotaxy of the apple-tree, expressed by the fraction 2/5.