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Spruce adelgids trick trees into making galls

Tiny tangles of white fluff appeared on blue spruces in the last several weeks.

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Chokecherries invite pollinators and frugivores, but poison herbivores

Chokecherries are blossoming, filling the air with a pleasant fragrance and attracting pollinators.
Chokecherry, Prunus virginiana, is a small tree or shrub with an immense range, from the Atlantic to the Pacific in Canada and in most of the 48 contiguous states with the exception of those in the southeast.

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By Steven R. Leigh The announcement last week that Elizabeth Fenn, associate professor and chair of the University of Colorado Boulder’s History Department, had been awarded the 2015 Pulitzer Prize in History for her book Encounters at the Heart of the World: A History of the Mandan People provided a striking exclamation point to mark […]

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Rust fungus induces flower mimics in host plants

Early in April, I was looking for the first of the spring flowers in the mountains and had found pasque flowers and, to my surprise, mountain ball cactus in bloom at Meyers Gulch, near Walker Ranch.

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Enjoying the multiple colors and forms of columbines

The blue columbine, Aquilegia coerulea, has the distinction of being the state flower, perhaps because it is one of the most beautiful and striking in the mountains.

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