the world > plants > part of plant > (defined by) distribution, arrangement, or position > [adjective] > alternating or not alternating (2)
Of things of the same kind occurring along the course of an axial line: situated first on one side… Botany. Of leaves or leaflets: occurring…
Botany. Situated directly above another part of the same kind (or one directly above another), as leaves on a stem, etc. Frequently contrasted with…