Rye (Secale cereale) is a grass grown extensively as a grain and forage crop. Rye is characterized by long-bearded spikes, or ears, and a tall and slender stem. There are two prominent varieties known as winter and spring rye. The grain or kernel of rye is smaller in size than that of wheat.

Rye

Rye (Secale cereale) is a grass grown extensively as a grain and forage crop. Rye is characterized by…

Part of a rye plant, showing small clasps of leaves.

Rye Plant

Part of a rye plant, showing small clasps of leaves.

Rye bore three ears of rye on a bend

Rye

Rye bore three ears of rye on a bend

A normal rye plant.

Rye

A normal rye plant.

An import cereal plant. It is native to the Levant but is cultivated extensively in temperate climates, especially in western Europe.

Rye

An import cereal plant. It is native to the Levant but is cultivated extensively in temperate climates,…

<i>Lolium perenne</i>. A sheath, in botany is "the part of an expanded organ that is rolled around a stem or other body, forming a tube, as in the lower part of the leaves of grasses..." &mdash;Whitney, 1889 
<p>This illustration show a single leaf of ryegrass in its sheath.

Ryegrass Leaf with Sheath

Lolium perenne. A sheath, in botany is "the part of an expanded organ that is rolled around a stem or…