A distinct area with specific environmental or biological characteristics.

Having visible or structural divisions into zones, often with different functions or appearances.

Geographic areas defined by climatic conditions that determine which plants are most likely to thrive there.

Describing a flower that can be divided into equal halves in only one plane; bilaterally symmetrical.

Having symmetry along one plane only, typical of some flowers like orchids and peas.

The cell formed by the fusion of male and female gametes; the first stage of a new organism’s development.

The loosening of a plant’s roots due to persistent wind movement.

A thin, flat extension of a plant organ, such as a seed, stem, or petal.

One of the lateral petals in a papilionaceous flower.

Having one or more thin, flat projections along an organ.