pseudacorus

The water Flag (_Iris pseudacorus_) is similar of growth, and equally well known by its brilliant heads of yellow flowers, with blade-like leaves, being found in wet places and water courses.

Herbal Simples Approved for Modern Uses of Cure William Thomas Fernie

We have two in England that are indigenous -- one the rich golden-yellow (_I. pseudacorus_), which in some favourable positions, with its roots in the water of a brook, is one of the very handsomest of the tribe; the other the Gladwyn (_I. fœtidissima_), with dull flowers and strong-smelling leaves, but with most handsome scarlet fruit, which remain on the plant and show themselves boldly all through the winter and early spring.

The plant-lore & garden-craft of Shakespeare Henry Nicholson Ellacombe 1868

To obtain this substance we treat the petals of _Centauria cyanus_, _Viola odorata_, or _Iris pseudacorus_, with boiling alcohol, by which the flowers are decolorized; and the liquid acquires immediately a fine blue color.

The Art of Perfumery And Methods of Obtaining the Odors of Plants George William Septimus Piesse 1851

As to irises, if something stylish is to your fancy, look for packages of I. pseudacorus x 'Holden Clough.'

SFGate: Don Asmussen: Bad Reporter Erle Nickel 2011

It is perhaps not without significance that the root of a marsh plant, the _Iris pseudacorus_ [360] is regarded in Germany as a luck-bringer which can take the place of the mandrake. [

The Evolution of the Dragon G. Elliot Smith

P'. i.kßerbloem .. a) Cardamlne pratensis; b) Iris pseudacorus.

Allgemeines Polyglotten-Lexicon der Naturgeschichte mit erklaerenden Anmerkungen Nemnich, Philipp Andreas, 1764-1822 1793