You searched for:
“phyllotaxis”
phyllotaxis
The order or geometric principles of arrangement of leaves (or other lateral members; such as, florets of a composite flower, scales of a pine-cone, etc.) upon an axis or stem.
- Cyclical or verticillate, in which a number of leaves (two or more) stand at the same level, forming a pair or whorl.
- Spiral or alternate, in which each leaf stands singly, with its points of insertion forming a spiral (the genetic spiral) around the stem.
The principal kinds of phyllotaxis are
In the latter case, the phyllotaxis is expressed by a fraction denoting the angle (or portion of one turn of the spiral) between two successive leaves; thus, in a 25 phyllotaxis, there are five leaves in every two turns of the spiral.
This entry is located in the following units:
phyllo-, phyll-, -phyll, -phyllous
(page 2)
taxi-, tax-, taxo-, taxio-, -taxia, -taxis, -taxy, tact-, -tactic, -tactical, -tactics
(page 7)