A serious and growing problem in the West is the invasion of non-native plant species, commonly called noxious weeds. Noxious refers to the species’ aggressive behavior, which damages native ...

Three-leaf sumac: This foothills native is tough, drought-tolerant and especially great on hard-to-plant slopes. It grows 3-6 feet tall and 5-8 feet wide. Its three-lobed leaves are glossy green ...

"It is to be hoped that the volume may lead to a clearer appreciation of the wonderful variety, the exquisite beauty, and the real value of that neglected part of native flora, the shrub." ...

Noxious refers to the species’ aggressive behavior, which damages native Colorado plant communities or economic crops. They do not have predators so they can adapt very successfully to Colorado ...