A small crown or coronet, especially on seeds.

In milkweed flowers, the gland connecting pairs of pollinia.

The outer layer of tissue in roots and stems, located between the epidermis and vascular tissue.

A flat-topped or convex inflorescence where the lower flower stalks are longer, bringing all flowers to about the same level.

Arranged in or resembling a corymb.

Having a worldwide distribution; occurring in most regions of the world.

A rib or midvein, especially the midrib of a leaf or frond.

Relating to or having ribs or veins.

A palm leaf that is intermediate between pinnate and palmate, with a definite costa (midrib) but partially divided.

Having one or more longitudinal ribs or ridges.