Yes, but they are so tiny that they cannot be seen at a glance. A grass's stem is only 1 to 3 milimeters (mm) in length, and are very close to the ground, almost below ground level.
leaf
Any grass plant would have weak stems because they are not woody. However, "cow grass" does not exist rendering this question moot.
weak stem
little blue stem
grass,mashroom,gabi
This is the stem.
The portion of a leaf that wraps around the stem at the base of the blade on a grass plant is called the sheath. It helps to provide structural support to the leaf and connects it to the stem.
runner/stolon
The creeping stem of a grass plant
It is the stem of a grass - a vegetable.
Illinois's state grass is it's most abundant growing grass, Big Blue Stem. It was declared official state grass in 1989.
Various grass species make up the majority of plant life in the grasslands. Some common species are Little Blue Stem, Big Blue Stem, Blue Grama and Buffalo Grass.