Describing species or populations where individuals are all similar in appearance or structure, with no distinct morphological differences.

Referring to a flower with a single, fused petal or a corolla that is not divided into separate petals.

A group of organisms that consists of all the descendants of a common ancestor, and only those descendants.

Describing a plant with a single stem or shoot arising from the ground, common in certain types of growth forms.

Referring to plants that grow from a single main stem or shoot, with branches or offshoots occurring irregularly.

A type of growth where a single axis or stem continues to grow while lateral branches form irregularly.

Describing a flower where the sepals are fused into a single structure rather than being separate.

A plant that produces a single seed per fruit or ovary.

Describing a fruit or plant that produces only one seed per fruit.

Referring to a plant or organism that produces only one type of spore, such as in certain types of ferns.