Iris foetidissima aka Stinking Iris

Iris foetidissima, also known as stinking iris, gladdon, Gladwin iris, roast-beef plant, or stinking gladwin, is a species of flowering plant in the family Iridaceae. It is native to Western Europe, including England and Ireland, as well as France, North Africa, Italy, and Greece. This rhizomatous, beardless iris grows up to 2 feet tall and has tufts of dark green leaves that emit an odor when crushed or bruised. Its flowers are usually dull leaden-blue or buff-yellow tinged with blue, with delicate veining. It blooms between June and July, but the flowers only last a day or so. The plant produces green seed capsules that are 5-8 cm long, which remain attached to the plant throughout the winter. The seeds are scarlet and very showy, often remaining in the open pods on the plants well into winter. Stinking Iris is cultivated in gardens in temperate zones and has gained the Royal Horticultural Society's Award of Garden Merit. In addition to its attractive coral seed clusters, it is also grown for its aesthetic value. Stinking Iris likes soil that is good at retaining moisture and needs regular watering to thrive. It does best in long-lasting, direct light and should be less than 1 foot from a window. It is a super rare houseplant that isn’t challenging to grow and doesn't need added fertilizers if you repot each time it doubles in size. Stinking Iris belongs to the Iris genus and is one of two iris species native to Britain, the other being the yellow iris (Iris pseudacorus). Its common names of 'gladdon' and 'gladwyn' or 'gladwin' are in reference to an old word for a sword, due to the shape of the irises leaves. The genus is named for the Greek goddess of the rainbow, and the specific epithet means very bad-smelling.