The surface where two similar organs join together (e.g., faces of united carpels).

An assemblage of plant species growing together in a particular habitat.

Densely or tightly arranged; having a condensed growth form.

The practice of growing different plants together for mutual benefit (pest control, nutrient sharing, etc.).

Flattened or leveled to lie in one plane.

Soil mapping unit containing two or more distinct soil types in an intricate pattern.

Folded upon itself (as in some leaves or floral parts).

A plant that grows upward by clinging to or twining around supports.

The cavity in the column of orchid flowers that contains the anther.

A gradual change in plant characteristics across a geographic or environmental gradient.