Panicle

Panicle

A Panicle is a type of inflorescence that is characterized by a multi-branched structure with flowers on short stalks along the axis. The panicle is a common form of inflorescence in many plant families, including the grass family (Poaceae), lily family (Liliaceae), and orchid family (Orchidaceae).

Structure and Function

The structure of a panicle can vary greatly depending on the plant species. In general, it consists of a main stem (the rachis) and multiple side branches, each of which may be further divided. The flowers are borne on short stalks (called pedicels) along these branches.

The panicle structure allows for efficient pollination, as the flowers are exposed to pollinators from multiple angles. It also facilitates seed dispersal, as the seeds are easily detached from the inflorescence when mature.

Types of Panicles

There are several types of panicles, including:

• Compound panicle: A panicle in which the branches are further divided into secondary branches.
• Simple panicle: A panicle in which the branches are not further divided.
• Pyramidal panicle: A panicle that is wider at the base than at the top, giving it a pyramidal shape.
• Cylindrical panicle: A panicle that is roughly the same width throughout, giving it a cylindrical shape.

Examples of Plants with Panicles

Many plants have panicle inflorescences, including:

• Rice (Oryza sativa): The inflorescence of rice is a type of panicle known as a spikelet.
• Oats (Avena sativa): The inflorescence of oats is a loose panicle.
• Orchids (Orchidaceae): Many orchids have panicle inflorescences.
• Lilacs (Syringa): Lilacs have large, showy panicles.

See Also

• Inflorescence
• Rachis
• Pedicel
• Spikelet