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Forage grasses for pasture and hay

The leaf collar region of a barley plant showing large, clasping auricles, a large membranous ligule, leaf sheath and blade.

Identifying forage grasses correctly is crucial for effective pasture and hay management, as well as for achieving maximum yields and profits. Each type of grass is unique; they can be distinguished from each other by their leaves and flowers.

How to identify grasses

Leaf characteristics

The grass leaf consists of a blade, ligule, auricle, and sheath. The region where the leaf blade and stem meet, called the collar, contains the most distinguishable leaf characteristics. These include auricles and ligules.

Auricles are finger-shaped projections or appendages that wrap around the stem. They can be absent or present, large or small and may have hairs.

A ligule is a thin appendage on the inner surface at the junction of the leaf blade and stem. Ligules can be membranous, hairy or absent. A membranous ligule is thin and translucent. Barley is an example of a grass with prominent auricles and ligules.

The blade is the expanded portion of the leaf, and the sheath is the lower part that surrounds or wraps around the stem.

A grass spikelet with several florets within a pair of glumes (left). Individual grass floret with the male and female reproductive parts surrounded by a vegetative lemma (awned) and palea (right). 

Seedhead characteristics

Grasses also have distinguishing floral traits. The seedheads are made up of individual grass flowers, called florets, and are not showy.

Outer coverings called lemmas and paleas protect the male (stamen) and female (pistil) reproductive parts. Lemmas are the outer bracts of a flower in grasses, and they can be either awned (having a long, slender projection) or unawned. Like lemmas and paleas, glumes are also bracts, but are located outside of one or more florets.

Seedheads can be arranged in one of two basic ways. When florets are stacked together on a stem or rachis, the arrangement is called a spike. In contrast, a panicle has a branching structure.

For more details on grass flowers, see Gardening with Native Grasses in Cold Climates: Parts of the plant.

Examples of panicles and spikes.

(Select an image to enlarge.)

Distinguishing grass growth habits: bunch versus sod forming 

Bunch grasses, such as orchardgrass, produce a single plant that spreads only by enlargement of the crown.

Sod-forming grasses spread by underground stems called rhizomes that can produce roots and new plants. Kentucky bluegrass is an example of a sod-forming grass. Sod-forming grasses have greater below-ground biomass and provide greater soil protection against erosion than bunch grasses.

Examples of bunch grass and sod-forming grass.

(Select an image to enlarge.)

Cool-season forage grasses

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Warm-season forage grasses

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Forage grasses: small grains

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Authors: Craig C. Sheaffer, retired Extension forage agronomist; Krishona Martinson, Extension equine specialist; and Jacob M. Jungers, agroecologist

Reviewed by Gabi Bolwerk, Extension educator

Reviewed in 2026

Page survey

© 2026 Regents of the University of Minnesota. All rights reserved. The University of Minnesota is an equal opportunity educator and employer. This work is supported by the U.S. Department of Agriculture’s National Institute of Food and Agriculture.