The first leaf or pair of leaves at the base of a new shoot or branch.

A leaf-like structure associated with a developing shoot or inflorescence.

Describes a plant habit where stems grow flat along the surface.

Having male reproductive organs mature before female ones in a bisexual flower.

Producing leaves before flowers during a growth cycle.

Plural of prothallus; the gametophyte stage in the life cycle of ferns and some other plants.

The gametophyte stage in ferns and some other plants, typically small and photosynthetic.

A prefix meaning ‘first’ or ‘early’, indicating primitiveness.

Maturation of the female reproductive parts before the male parts in the same flower.

The main vein running through a leaf from which secondary veins branch.