Trees

	Gambel oak grove in the upper canyons of the monument NPS Photo / N Scarborough Colorado National Monument is home to both evergreen and broadleaved trees. The most common species you'll encounter on your visit will probably be the Utah juniper, followed closely by the pinyon pine. If you wander into the washes at the bottoms of the canyons, cottonwoods will likely be your most-visited tree species. The single-leaf ash grows almost like a shrub among the pinyon-juniper woodland. Depending on water availability, you might also come across Gambel oaks, box-elders, ponderosa pines, Douglas firs, and even quaking aspens.   Pinyon Pine Pinyon Pine (Pinus edulis) (aka Pinyon, Piñon, Two-leaf Pinyon, Two-needle Pinyon, Colorado Pinyon) Utah Juniper Utah Juniper (Juniperus osteosperma) Rio Grande Cottonwood Rio Grande Cottonwood (Populus deltoides) (aka Fremont's Cottonwood, Meseta Cottonwood) Single-Leaf Ash Single-Leaf Ash (Fraxinus anomala) (aka Dwarf Ash)