A tree can be defined as a large, perennial, woody plant. Though there is no set definition regarding minimum size, the term generally applies to plants at least 6 m (20 ft) high at maturity and, more importantly, having secondary branches supported on a single main stem or trunk (see shrub for comparison). Compared with most other plant forms, trees are long-lived. A few species of trees grow to 100 m tall, an ...

Including:

• Tree - Classifications
• Tree - Morphology
• Tree - Champion trees
• Tree - Major tree genera
• Tree - Flowering plants Magnoliophyta; angiosperms
• Tree - Conifers Pinophyta; softwood trees
• Tree - Ginkgos Ginkgophyta
• Tree - Cycads Cycadophyta
• Tree - Ferns Pterophyta
• Tree - Life stages
• Tree - Bibliography

Read more here: » Tree: Encyclopedia - Tree

See also:

Tree, Tree - Classifications, Tree - Morphology, Tree - Champion trees, Tree - Major tree genera, Tree - Flowering plants Magnoliophyta; angiosperms, Tree - Conifers Pinophyta; softwood trees, Tree - Ginkgos Ginkgophyta, Tree - Cycads Cycadophyta, Tree - Ferns Pterophyta, Tree - Life stages, Tree - Bibliography

Read more here: » Tree: Encyclopedia II - Tree - Major tree genera

The world's champion trees can be considered on several factors; height, trunk diameter or girth, total size, and age. It is significant that in each case, the top position is always held by a conifer, though a different species in each case; in most measures, the second to fourth places are also held by conifers. Tallest trees The heights of the tallest trees in the world have been the subject of considerable dispute and much (often wild) exaggeration. Modern verified measurement with laser rangefinders combined w ...

See also:

Tree, Tree - Classifications, Tree - Morphology, Tree - Champion trees, Tree - Major tree genera, Tree - Flowering plants Magnoliophyta; angiosperms, Tree - Conifers Pinophyta; softwood trees, Tree - Ginkgos Ginkgophyta, Tree - Cycads Cycadophyta, Tree - Ferns Pterophyta, Tree - Life stages, Tree - Bibliography

Read more here: » Tree: Encyclopedia II - Tree - Champion trees

Cordaitales † Pinales   Pinaceae - Pine family   Araucariaceae - Araucaria family   Podocarpaceae - Yellow-wood family   Sciadopityaceae - Umbrella-pine family   Cupressaceae - Cypress family   Cephalotaxaceae - Plum-yew family   Taxaceae - Yew family Vojnovskyales † Voltziales † The conifers, division Pinophyta, are one of 13 or 14 division level taxa within the Kingdom Plantae. They ar ...

Including:

• Pinophyta - Taxonomy and naming
• Pinophyta - Morphology
• Pinophyta - Foliage
• Pinophyta - Reproduction
• Pinophyta - Life cycle
• Pinophyta - Other facts
• Pinophyta - External link

Read more here: » Pinophyta: Encyclopedia - Pinophyta

The division name Pinophyta conforms with the rules of the ICBN, which state (Art 16.1) that the names of higher taxa in plants (above the rank of family) are either based on the name of the type genus, in this case, Pinus (pines), or are descriptive. In the latter case the name for the conifers is Coniferae (Art 16 Ex 2), which is in widespread use as well. Older scientific names (no l ...

See also:

Pinophyta, Pinophyta - Taxonomy and naming, Pinophyta - Morphology, Pinophyta - Foliage, Pinophyta - Reproduction, Pinophyta - Life cycle, Pinophyta - Other facts, Pinophyta - External link

Read more here: » Pinophyta: Encyclopedia II - Pinophyta - Taxonomy and naming

Although the total number of species is relatively small, conifers are of immense ecological importance. They are the dominant plants over huge areas of land, most notably the boreal forests of the northern hemisphere, but also in similar cool climates in mountains further south. Many conifers have distinctly scented resin, secreted to protect the tree against insect infestation and fungal infection of wou ...

See also:

Pinophyta, Pinophyta - Taxonomy and naming, Pinophyta - Morphology, Pinophyta - Foliage, Pinophyta - Reproduction, Pinophyta - Life cycle, Pinophyta - Other facts, Pinophyta - External link

Read more here: » Pinophyta: Encyclopedia II - Pinophyta - Other facts

All living conifers are woody plants, and most are trees, the majority having monopodial growth form (a single, straight trunk with side branches). The size of mature conifers varies from less than one metre, to over 100 metres. The world's tallest, largest, thickest and oldest living things are all conifers. The tallest is a Coast Redwood (Sequoia sempervirens), with a height of 112.34 metres. The largest is a Giant Sequoia (Sequoiadendron giganteum), with a volume 1486.9 cubic metres. The thickest, or tree with the greatest t ...

See also:

Pinophyta, Pinophyta - Taxonomy and naming, Pinophyta - Morphology, Pinophyta - Foliage, Pinophyta - Reproduction, Pinophyta - Life cycle, Pinophyta - Other facts, Pinophyta - External link

Read more here: » Pinophyta: Encyclopedia II - Pinophyta - Morphology

The basic parts of a tree are the roots, trunk(s), branches, twigs and leaves. Tree stems consist mainly of support and transport tissues (xylem and phloem). Wood consists of xylem cells, and bark is made of phloem and other tissues external to the vascular cambium. Trees may be broadly grouped into exogenous and endogenous trees according to the way in which their stem diameter increases. Exogenous trees, which comprise the great majority of modern trees (all conifers, and all broadleaf trees), grow by the ...

See also:

Tree, Tree - Classifications, Tree - Morphology, Tree - Champion trees, Tree - Major tree genera, Tree - Flowering plants Magnoliophyta; angiosperms, Tree - Conifers Pinophyta; softwood trees, Tree - Ginkgos Ginkgophyta, Tree - Cycads Cycadophyta, Tree - Ferns Pterophyta, Tree - Life stages, Tree - Bibliography

Read more here: » Tree: Encyclopedia II - Tree - Morphology

A tree is a plant form and trees occur in many different orders and families of plants. Trees thus show a wide variety of growth form, leaf type and shape, bark characteristics, reproductive structures, etc. The earliest trees were tree ferns and horsetails, which grew in vast forests in the Carboniferous Period; tree ferns still survive, but the only surviving horsetails are not of tree form. Later, in the Triassic Period, conifers, ginkgos, cycads and other gymnosperms appeared, and subsequently flowering plants in the Cretaceous Pe ...

See also:

Tree, Tree - Classifications, Tree - Morphology, Tree - Champion trees, Tree - Major tree genera, Tree - Flowering plants Magnoliophyta; angiosperms, Tree - Conifers Pinophyta; softwood trees, Tree - Ginkgos Ginkgophyta, Tree - Cycads Cycadophyta, Tree - Ferns Pterophyta, Tree - Life stages, Tree - Bibliography

Read more here: » Tree: Encyclopedia II - Tree - Classifications

The life cycles of trees, especially conifers, are divided into the following stages in forestry for survey and documentation purposes: Seed Seedling: the above ground part of the embryo that sprout from the seed Sapling: After the seedling reaches 1m tall, and until it reaches 7cm in stem diameter Pole: young trees from 7-30cm diameter Mature tree: over 30cm diameter, reproductive years begin Old tree: dominate old growth forest; height growth slows greatly, with majority of producti ...

See also:

Tree, Tree - Classifications, Tree - Morphology, Tree - Champion trees, Tree - Major tree genera, Tree - Flowering plants Magnoliophyta; angiosperms, Tree - Conifers Pinophyta; softwood trees, Tree - Ginkgos Ginkgophyta, Tree - Cycads Cycadophyta, Tree - Ferns Pterophyta, Tree - Life stages, Tree - Bibliography

Read more here: » Tree: Encyclopedia II - Tree - Life stages

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