Having one or more longitudinal grooves or channels.

(1) The woody stem of grasses like bamboo; (2) The fruiting stem of brambles like raspberries.

Covered with grayish-white or hoary fine hairs, giving a frosted appearance.

A localized necrotic lesion on stems, branches or trunks, often caused by fungi or bacteria.

The uppermost layer of branches and foliage in a forest or plant community.

(1) Hair-like in form; (2) Relating to capillary action in soil or plant tissues.

The ability of water to move in narrow spaces against gravity due to surface tension.

Having small pouch-like structures.

A low, densely branched shrub or the characteristic growth form of certain plants.

A garden designed to attract and support butterflies with appropriate nectar and host plants.