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Populus trichocarpa, the black cottonwood, [1] western balsam-poplar [2] or California poplar, is a deciduous broadleaf tree species native to western North America. It is used for timber , and is notable as a model organism in plant biology .
This is a list of U.S. state, federal district, and territory trees, ... California: Coast redwood: Sequoia sempervirens: 1937 [8] [9] Giant sequoia: Sequoiadendron ...
Above the tree line, extreme winds preclude tree-like growth. [6]: 17 Constant winds hitting the plants limits their size and flattens their shape. [10] Small size or dwarfism is therefore an adaptive feature to the extremes, and most alpine plants are just a few inches tall.
Parkinsonia florida grows to heights of 10–12 metres (33–39 ft). It is a rapidly growing large shrub or small tree, and rarely survives to 100 years.Compared to the closely related Parkinsonia microphylla (foothill paloverde), it appears more decumbent in overall form, is taller, and matures more quickly.
Ceanothus is a genus of about 50–60 species of nitrogen-fixing shrubs and small trees in the buckthorn family (). [3] [4] [2] [5] Common names for members of this genus are buckbrush, California lilac, soap bush, or just ceanothus.
Western white pine is a large tree, regularly growing to 30–50 metres (98–164 ft) tall. It is a member of the white pine group, Pinus subgenus Strobus, and like all members of that group, the leaves ('needles') are in fascicles (bundles) of five, [5] with a deciduous sheath.
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Quercus douglasii is a medium-sized tree with sparse foliage, generally 6–20 meters (20–66 feet) tall, with a trunk 36–60 centimeters (1–2 ft) in diameter at breast height. [5] Trunks are typically solitary, but some trees have multiple trunks. [5] [8] The tallest recorded specimen was found in Alameda County, at 28.7 m (94 ft).