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It can grow 10–20 ft or more with a spread of 1 ⁄ 3 to 2 ⁄ 3 the height. It is a very slender tree with few branches as well as leaves.The petiolar-rachis is characteristically long and functions as a cladophyll. it has a white or yellow-colored peeling off bark.
Individual trees can live for over 300 years. [ 4 ] The leaves are thick with a waxy texture, elliptical, 7 to 15 cm ( 2 + 3 ⁄ 4 to 6 in) long and 4 to 8 cm ( 1 + 1 ⁄ 2 to 3 + 1 ⁄ 4 in) broad, arranged spirally; they are glossy dark green above and a lighter, more grayish green beneath, with an entire margin.
The bark is grey and covered with lenticels, becoming thick and deeply fissured on old trees. The bark can become hard enough to cause sparks when cut with a chainsaw. [9] The stem is grey in the older parts and light brown in younger parts. The crown is usually roughly conical and quite dense. In large trees, the lower branches droop downwards.
Physocarpus opulifolius, known as common ninebark, [3] Eastern ninebark, Atlantic ninebark, or simply ninebark, is a species of flowering plant in the rose family Rosaceae, native to eastern North America, named for its peeling multi-hued bark [4]
Physocarpus are deciduous shrubs with peeling bark [2] and alternately arranged leaves. The leaves are palmate with 3 to 7 lobes and often toothed edges. The inflorescence is a cluster of bell-shaped flowers with 5 rounded white or pink petals and many stamens. The fruit is a flat or inflated dehiscent follicle. [3] [4]
Peeling bark. Its bark is an excellent fire starter; it ignites at high temperatures even when wet. The bark has an energy density of 5,740 cal/g (24,000 J/g) and 3,209 cal/cm 3 (220,000 J/cu in), the highest per unit weight of 24 species tested. [11] Birch bark is used in a number of crafts by various Native American tribes (e.g. Ojibwe). [22]
After numerous California wildfires ravaged the dense forests of California, officials there are set to remove over 10,000 trees after they were damaged by the flames, drought, disease, and age.
Generally the tree's smooth young bark begins to split around 40–50 years of age, and then begins to peel off the trunk around the age of 70-80. It is then replaced by another layer of bark, which will begin to peel at around 130–150 years. The third layer will peel when the tree has reached 200–210 years and achieved "old growth" status.