Annual

A plant that completes its life cycle and dies within a year.

Perennial

Living through three or more seasons.

Annual

A plant that completes its life cycle and dies within a year.

Perennial

Living through three or more seasons.

Awn

A bristle characteristic of the spikelets in some grasses.

Bunchgrass

Plant has no stolons or Rhizomes and consequently grows in a bunch rather than spreading.

Inflorescence

Flower structure of a grass plant.

Node

A joint where a leaf is or was attached to a stem.

Internode

Area of the stem between two nodes.

Panicle

A type of flower in which the flower clusters are attached to the stem via branches connected to branches off the stem.

Raceme

A type of flower in which the flower clusters are attach to the stem via branches.

Spike

A type of flower in which are the flower clusters are attached directly to the stem.

Panicle

A type of flower in which the flower clusters are attached to the stem via branches connected to branches off the stem.

Raceme

A type of flower in which the flower clusters are attach to the stem via branches.

Spike

A type of flower in which are the flower clusters are attached directly to the stem.

Panicle

A type of flower in which the flower clusters are attached to the stem via branches connected to branches off the stem.

Raceme

A type of flower in which the flower clusters are attach to the stem via branches.

Spike

A type of flower in which are the flower clusters are attached directly to the stem.

Prostrate

Growing flat along the ground.

Rhizome

A stem that grows horizontally below the ground surface and may form adventitious roots at the nodes.

Sheath

Base portion of the grass leaf that wraps around the stem.

Stolon

A stem that grows horizontally along the ground surface and may form adventitious roots and a new plant at the nodes.

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Topics : Species and Forage Variety Trials : Identifying Common Pennsylvania Grasses : Grass Structures

Review Structures Used to Identify Grasses

Please click on the red text for sample images and mouseover the hightlighted text for definitions.