Barberries and Wheat

If you look at the entries in the Flora of North America for barberry species (Berberis), each notes whether it hosts Puccinia or not. That is not a common sort of entry into a plant description; Puccinia is a fungus, the genus of wheat rusts. (Examples  Berberis amplectens, Berberis aquifolium , Berberis bealei and every other one: scroll down to Discussion).

Japanese barberry

Here's the story:

Plant Story--Creeping Hollygrape, Berberis repens

It is spreading all over my yard, but I can't get its name right.

I'm used to calling it Oregon grape, but in fact, the one on the Front Range in Colorado is not really Oregon grape. The usual Oregon grape is Berberis aquifolia. It is Berberis repens that is common in Colorado. Common names for this plant include creeping hollygrape, creeping barberry, creeping mahonia, and creeping Oregon grape.