GSM 2013 March Death Valley - Day 1
Mar 19, 2013Public
Photo: Saturday, March 9, 2013
Photo: Teutonia Peak is on the right side. Joshua trees in the foreground.
Photo: Joshua trees are confined mostly to the Mojave Desert between 1,300 and 5,900 ft elevation.
Photo: Horizontal branches of a Joshua tree.
Photo: The trunk and branches of a Joshua tree are made of thousands of small fibers and lack annual growth rings, making it difficult to determine a tree's age.
Photo: The Joshua tree (Yucca brevifolia) is a species of yucca.
Photo: Flower bud on a Joshua tree
Photo: Cholla cactus
Photo: The Joshua tree's unique shape reminded Mormon settlers of a Biblical story in which Joshua reaches his hands up to the sky in prayer.
Photo: A fallen Joshua tree
Photo: Stump of the fallen Joshua tree
Photo: Silver cholla (Cylindropuntia echinocarpa)
Photo: The cholla's stem and branches are made up of cylindrical segments
Photo: If a Joshua tree survives the rigors of the desert it can live for hundreds of years with some specimens surviving up to a thousand years.
Photo: The evergreen leaves are dark green, linear, bayonet-shaped, 6–13 inches long and 0.3-0.6 inches broad at the base, tapering to a sharp point; they are borne in a dense spiral arrangement at the apex of the stems.
Photo: The cholla's fleshy tubercles each bear up to 20 long, straight grayish or yellowish spines which may be 1.5 inches long.
Photo: Joshua trees are fast growers for the desert; new seedlings may grow at an average rate of 3.0 in/year in their first 10 years, then only grow about 1.5 in/year thereafter.
Photo: Last year's flower stalks on a Joshua tree