- Crested Butte Wildflower Festival
 - Annual week-long wildflower festival held in Crested Butte, Colorado, every July. - Southwest Colorado Wildflowers, Ferns, & Trees
- Features photographs and descriptions of flora in Southwest Colorado and the Four Corners area.
- Colorado Dahlia Society
- Contains society info, garden photos, tips on growing dahlias, events, and more.
- Colorado Native Plant Society
- Nonprofit organisation dedicated to the appreciation and conservation of the Colorado native flora.
- Colorado State Forest Service@
- Trees and Shrubs of Western Colorado: Problems and Care
- Discussion of tree and shrub care and specific insect and disease problems, with photographs.
- Colorado Wildflower Photo Album
- Collection of Colorado wildflower pictures arranged by flower colour.
- Wildflowers of Boulder County
- Trail-specific guide to the wildflowers of Boulder County, covering all five botanic zones.
- Fort Collins Native Plants: Plant Characteristics and Wildlife Value of Commercial Species
(PDF) - Report from the City of Fort Collins Natural Resources Department.
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