Here's one thing I found:

"Parrot's Feather has feathery blue-green foliage with a velvety sheen that
creeps across surface of pond. Its stems can grow from 20 to 60 inches long,
and are divided into four to six vivid green segments.
Parrot's Feather's lushly textured foliage helps provide shade for the pond
and fish. It also provides a hiding place and spawning material for the pond
inhabitants.

Because of its capability of establishing itself in wet soil above the
water, Parrot's Feather can be used in waterfall crevices, as well as along
pond edges. Although it may be prone to frost damage, it winters well
beneath the ice in frozen ponds. Zones 4-11."

Gareee
(Gary Tabar Jr.)