A structure that holds something in place, such as an organ or a spore mass in orchids or mosses.

Pointing backward, often describing hairs or spines.

Blunt at the tip with a small notch in the center.

To return to a previous or ancestral state, especially in cultivated plants reverting to wild forms.

A detailed review or reclassification of a group of plants based on new information.

Curled or rolled downward or backward, especially leaf margins.

A small axis bearing the florets in a spikelet, especially in grasses.

The main axis of a compound leaf or an inflorescence.

A plant adapted to grow in fast-flowing water or periodically flooded habitats.

An inflorescence where flowers spread out in one plane like a fan.