Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Category of axis vs. branching order. The relative arrangement of categories of axes (T, trunk; B, branch; S, short shoot) may (A, i.e. Araucaria araucana) or may not (B and C) be superposed to the notion of branching order, in either monopodial (B, i.e. Acer sp.) or sympodial (C, i.e. Platanus sp.; Caraglio and Edelin, 1990) branching pattern. x, apical mortality; BOn, branching order n; AOn, apparent branching order n.
