what color is Iris pseudacorus?

 

No, seriously! As I'm sure many of you know, lots of flowers have ultraviolet patterns, invisible to us, that help them attract bees and other pollinators that can see ultraviolet. Check out this set of photos of Iris pseudacorus I came across online:


And the blog post they're from:

The left photo is natural light, while the other two are different wavelengths of UV. The bright areas are parts that reflect UV (the parts that would be ultraviolet-colored if we could see it), while the dark areas absorb UV (and so are not ultraviolet).

If my understanding is correct, this means that Iris pseudacorus is best described as ultraviolet, not yellow! It has bright ultraviolet style arms and paler ultraviolet falls with a bright yellow signal and yellow veining.

Sean Z

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