Trees

  • Oasis at the Desert Edge: Flora of Cañón del Nacapule, Sonora, Mexico

Cañón del Nacapule cuts into the southeastern flank of the Sierra El Aguaje, a rugged volcanic range about 20 kilometers northwest of Guaymas. Nacapule is included in the Sonoran segment of the...

Type of Content: Reports, Papers, Journal Articles

Fire is a dominant ecological process in almost all landscapes of La Frontera. Fire histories from throughout the region on the United States side of the border show that, before circa 1900,...

Type of Content: Reports, Papers, Journal Articles

Observations of the Sierra Madrean oak Quercus viminea in ten Sky Island mountain ranges 15 to 85 km south of the Arizona and New Mexico border in Sonora and Chihuahua help define the northern and...

Type of Content: Reports, Papers, Journal Articles

The southern half of the state of Arizona. may be briefly characterized as a relatively level plain studded with numerous hills and mountains. The plain rises from elevations of a few hundred feet...

Type of Content: Reports, Papers, Journal Articles
  • Prosopis velutina, velvet mesquite

Maybe more than any other tree in our region, the velvet mesquite has a large impact on our landscape. This tree is both incredibly tenacious and invasive as well one of the most productive trees...

Type of Content: Species Profile
Ficus insipida with huge buttress roots
Type of Content: Image Content
Quercus viminea forest in the Sierra Pinito
Type of Content: Image Content
Juniperus deppeana, leaves and fruit
Type of Content: Image Content
Quercus hypoleucoides, silverleaf oak
Type of Content: Image Content
Prunus serotina, Arizona
Type of Content: Image Content
Quercus chihuahuensis leaves and bark
Type of Content: Image Content
Quercus albocincta leaves
Type of Content: Image Content
Ceiba acuminata trunk
Type of Content: Image Content
Ceiba acuminata
Type of Content: Image Content
Bursera fagaroides flower close-up
Type of Content: Image Content
Acacia cochliacantha leaves and flower
Type of Content: Image Content
Arbutus xalapensis leaves and bark
Type of Content: Image Content

Canotia holacantha Torrey is reported from the Gulf of California, Mexico on Isla Tiburón. This population is isolated from its closest conspecifics in northern Sonora by 230 km and is best...

Type of Content: Reports, Papers, Journal Articles
Thornscrub before and after heavy February 2011 frost

These photos were taken by Aaron Flesch before and after the February 2 and 3, 2011 frost. This unusually severe frost event was the worst freeze seen across Sonora and Arizona at least 50 years....

Type of Content: Image Content

February 2nd and 3rd 2011 laid a heavy hand on the NJP reserve. An arctic air mass descended on southwestern North America, stretching its influence south of its typical reach. Individual species...

Type of Content: Blog entry
Ponderosa pine in the White Mountains
Type of Content: Image Content
Picea engelmannii, Engelmann spruce

Bark

Type of Content: Image Content
Picea engelmannii, Engelmann spruce
Type of Content: Image Content

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