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Giant Redwoods and Sequoias (Sequoia National Park)
About the Trees: Redwood (National and State Parks
California)

Redwood National and State Parks (Wikipedia)
Sequoioideae (Wikipedia)

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tree : a woody perennial plant having a single usually elongate main stem generally with few or no branches on its lower part — Webster

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Tree is a perennial plant with an elongated stem, or trunk, supporting branches and leaves in most species. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber or plants above a specified height. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a woody trunk and branches as a way to tower above other plants to compete for sunlight. In looser senses, the taller palms, the tree ferns, bananas and bamboos are also trees. Trees tend to be long-lived, some reaching several thousand years old. The tallest known tree, a coast redwood named Hyperion, stands 115.6 m (379 ft) high. Trees have been in existence for 370 million years. — Wikipedia

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The History of Arboriculture (Citywide)

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Educational Activities about Trees (Trees are Good)

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The Center for Tree Science: Securing the future of trees (The Morton Arboretum)

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Trees News -- ScienceDaily Read all about trees, including the latest research on many tree species, insect infestations, and the role of trees in ecology. Full articles, photos, free.

  • Mathematician's study of 'swarmalators' could...
    on November 17, 2017 at 7:17 pm

    How does the Japanese tree frog figure into the latest work of a noted mathematician? As it turns out, quite prominently. Researchers used the curious mating ritual of male Japanese tree frogs as inspiration for their exploration of 'swarmalators' -- their term for systems in which both synchronization and swarming occur together. […]

  • Asthma attacks reduced in tree-lined urban...
    on November 17, 2017 at 3:38 pm

    People living in polluted urban areas are far less likely to be admitted to hospital with asthma when there are lots of trees in their neighborhood, a new study has found. […]

  • European forests might not be realizing their...
    on November 17, 2017 at 1:58 pm

    European forest managers can have their cake and eat it, because according to a new study maximizing timber production in a forest does not necessarily have to come at a cost of reduced species diversity or the capacity to regulate climate change by the same forest. However most European forests fall well below their possible maximum levels of these three capacities. […]

  • Are petite poplars the future of biofuels?...
    on November 15, 2017 at 7:15 pm

    Scientists are trying to make poplar a viable competitor in the biofuels market by testing the production of younger poplar trees that could be harvested more frequently — after only two or three years — instead of the usual 10- to 20-year cycle. […]

  • Pine and poplar wood improve sunlight-driven...
    on November 15, 2017 at 6:09 pm

    Engineers have found that porous types of wood from trees like poplar and pine can greatly increase the efficiency of water-to-steam conversion under sunlight. The findings could be used in a simple and inexpensive biodegradable device for water purification. […]