phyllotaxis

[ fil-uh-tak-sis ]

/ ˌfɪl əˈtæk sɪs /

Origin of phyllotaxis

First recorded in 1870–75; phyllo- + -taxis

In different species of the same genus the phyllotaxis frequently varies.

Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 3 |Various
The former condition represents a lower, the latter condition represents a higher, order of phyllotaxis.

The Genus Pinus |George Russell Shaw
Phyllotaxis, or Phyllotaxy, the arrangement of leaves on the stem, 67.

The Elements of Botany |Asa Gray
The angle of divergence may alter either abruptly or gradually, and the phyllotaxis thus becomes very complicated.

Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 3 |Various

Such are the majority of the scales of the cone and represent more or less indefinite conditions of phyllotaxis.

The Genus Pinus |George Russell Shaw

phyllotaxis

/ (ˌfɪləˈtæksɪs) /

the arrangement of the leaves on a stem

the study of this arrangement in different plants

phyllotactic, adjective