What is "guelder roses"

Usage examples of "guelder roses".

And the light music of the dropping whey is in my ears, mingling with the twittering of a bird outside the wire network window--the window overlooking the garden, and shaded by tall Guelder roses.

Could she be the same Hetty that used to make up the butter in the dairy with the Guelder roses peeping in at the window--she, a runaway whom her friends would not open their doors to again, lying in this strange bed, with the knowledge that she had no money to pay for what she received, and must offer those strangers some of the clothes in her basket?