Gladiolus palustris reaches on average 30–60 centimetres (12–24 in) of height.
The stem is erect, glabrous and unbranched, the bulbus is spherical with cross-linked fibers at the top.
The leaves are shorter than the stem, simple, with a parallel venation, sword-shaped, 4–9 centimetres (1.6–3.5 in) long.
 The inflorescence is composed of three to six hermaphroditic flowers, trifoliate, with a rosy violet or magenta perigonium, about 30 centimetres (12 in) long.
The flowering period of these plants extends from May through July.
They are pollinated by bumblebees.
Gladiolus palustris reaches on average 30–60 centimetres (12–24 in) of height. The stem is erect, glabrous and unbranched, the bulbus is spherical with cross-linked fibers at the top. The leaves are shorter than the stem, simple, with a parallel venation, sword-shaped, 4–9 centimetres (1.6–3.5 in) long.  The inflorescence is composed of three to six hermaphroditic flowers, trifoliate, with a rosy violet or magenta perigonium, about 30 centimetres (12 in) long. The flowering period of these plants extends from May through July. They are pollinated by bumblebees.
Gladiolus palustris