Extraordinary colouration, vivid markings and the complex orchid-like form of the Gladdon (Iris foetidissima) can stop you in your tracks when you come upon it like this.
Amazingly, despite the Gladdon being a common British wild-flower, many people have never seen one, or have passed it over without the close scrutiny it deserves. It tends to grow in undergrowth, and its dark evergreen leaves can be easily overlooked, then when it does flower, the display lasts only a few days.
There seem to be significant variations in the flower colour, with the more common being a blue rather than yellow base, although both have the brown and biscuit markings.