Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

Home to the plants of the Sonoran, Chihuahuan and Mojave Deserts

Cirsium ochrocentrum, Yellowspine Thistle

Burseraceae, Elephant Tree or Torchwood Family

also known as the Myrrh and Incense Family

The Burseraceae Family is also known as the Torchwood Family, the Frankincense and Myrrh Family and the Incense Tree Family.

Burseraceae has about 16 genera and approximately 615 species.

References:
The Plant List. A working list of all known plant species. [accessed 15 February 2015]
http://www.theplantlist.org/browse/A/Burseraceae/
Wikipedia contributors, 'Burseraceae', Wikipedia, The Free Encyclopedia, 13 June 2014, 19:04 UTC,
[accessed 15 February 2015]
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database – ITIS search