Pin oak (Quercus palustris) - trees - September 2017
One of several Pin Oaks located in the Princesshay area of Exeter, UK. === Pin oaks are medium-sized oaks that reach up to 70 feet in height. Their crowns may exceed 40 feet, and they often contain drooping limbs near the base. Pin oaks are part of the red-oak group, and, as with all other red oaks, their acorns take two years to reach maturity. Most people find red oak acorns to be bitter and unpalatable Pin oaks are native to the eastern and central United States and central Canada. Pin oaks have a pyramidal growth form while they are young, although their crowns become rounded or oval in shape upon maturation. Pin oaks have deeply lobed, bristle-tipped leaves that usually turn red or brown as autumn approaches. However, the leaves often remain on the tree throughout the winter and are only jettisoned in the spring when new growth emerges. Produces yellow-green catkins that are 5¬–7" long and typically appear in April and May. The name "pin oak" is possibly due to the many small, slender twigs, but may also be from the historical use of the hard wood for pins in wooden building construction. This tree grows at a fast rate, with height increases of more than 24" per year. Tolerates heat, air pollution and compacted soil. === Scientific classification Kingdom: Plantae (unranked): Angiosperms (unranked): Eudicots (unranked): Rosids Order: Fagales Family: Fagaceae Genus: Quercus Section: Lobatae Species: Q. palustris Binomial name Quercus palustris
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