Self-hybridizing columbine?

[Kensey]

We have columbine (http://en.wikipedia.org/wiki/Aquilegia) all over our yard. Not all of it seems to bloom, but yesterday I noticed that several had. Unlike last year, when the flowers were all simple columbine (like these (http://www.georgecannonphotography.com/blogimages/columbine.jpg), but of a very pretty magenta color), this year they all seem to be double-flower hybrids much like the one shown on the Wikipedia page linked above.

Do different varieties of columbine sometimes bloom in different years, or have my columbine self-hybridized?

[JiveTurkey]

A lot of varieties bloom every other year, so that would make sense.

[WVGeo]

I think I just read something about columbine tending to hybidize on their own. They are also supposed to be deer-resistant.

[LFE]

We have some purple ones this year, that did not bloom over the past 2 springs...
And then in the Springs area I took this pic of some red ones that were way up on the rock face you walk under while on route to the bath house..

7040

[millers1]

The stink beetles probably hit 'em with some "special" fertilizer....