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Juniperus ashei (Ashe juniper, mountain cedar, blueberry juniper, post cedar, or just cedar) is a drought-tolerant evergreen tree, native from northeastern Mexico and the south-central United States to southern Missouri. The largest areas are in central Texas, where extensive stands occur.
Trees can be girdled by climbing, twining, and ground-creeping (rampant) vines. There are several invasive species that harm trees in this way and cause significant damage to forest canopy and the health of ecosystems dependent on it. Oriental Bittersweet, Oriental Wisteria, and English Ivy all can damage and kill trees by girdling. [citation ...
Young bark is reddish-brown and smooth. As it matures, it becomes a dark, dusty gray or brown and takes on a shredded texture. Yellow thorns up to one inch long appear on the young branches. The leaves are about 3–6 in (7.5–15 cm) long, fine, and bipinnately compound. They fold closed at night.
Trees can explode when struck by lightning. [3] [15] [16] [17] The strong electric current is carried mostly by the water-conducting sapwood below the bark, heating it up and boiling the water. The pressure of the steam can make the trunk burst. [3] [17] This happens especially with trees whose trunks are already dying or rotting.
Cultivated as a bonsai, ponderosas are prized for their rough, flaky bark, contorted trunks, flexible limbs, and dramatic deadwood. Collected specimens can be wildly sculpted by their environment, resulting in beautiful twisted trunks, limbs and deadwood. In the mountains they can be found growing in pockets in the rock, stunting their growth.
Scientific matching of dead trees' growth rings with living ones has created a 9,000-year-long record. Bristlecone pines are known for attaining great ages. The oldest bristlecone pine in the White Mountains is Methuselah, which has a verified age of 4,856 years. It is located in the White Mountains of Inyo County in Eastern California. However ...
Juniperus scopulorum is a small evergreen tree that in favorable conditions may reach as much as 20 metres (66 feet) in height. [4] However, on sites with little water or intense sun it will only attain shrub height, and even those that reach tree size will more typically be 4.6–6.1 metres (15–20 feet) tall in open juniper woodlands. [5]
At timberline, a single tree can leave behind a ring of trees (an 'atoll') via layering. [4] The species has benefited from wildfire suppression in more recent years. [4] Various animals, including mountain goats, take shelter in subalpine fir clusters and krummholz. [4] The bark is browsed by game animals and its leaves are eaten by grouse.