A type of inflorescence where flowers are arranged in a linear sequence on an unbranched stem.

A flower arrangement in which individual flowers are attached directly to a central, unbranched stalk.

A small, individual unit of a spike, typically found in grasses and some other plants.

A small, secondary flower or unit of a spike, commonly seen in grasses and sedges.

A smaller flower cluster found within a larger inflorescence, characteristic of grasses and similar plants.

A long, slender, and usually tapering structure, often referring to a type of stem or plant part.

A sharp, rigid outgrowth or projection from a plant or animal, typically serving as a defense mechanism.

A stiff, pointed structure that extends from a plant or animal body, often for protection.

A modified leaf, leaf tip, or stem that is hard and pointed, often for defense or protection.

Having spiny characteristics or bearing spines, often referring to a plant with sharp, pointed structures.