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  2. Vachellia xanthophloea - Wikipedia

    en.wikipedia.org/wiki/Vachellia_xanthophloea

    The trees grow to a height of 15–25 m (49–82 ft). The characteristic bark is smooth, powdery and greenish yellow, although new twigs are purple, flaking later to reveal the characteristic yellow. [4] It is one of the few trees where photosynthesis takes place in the bark. Straight, white spines grow from the branch nodes in pairs.

  3. Fruit tree forms - Wikipedia

    en.wikipedia.org/wiki/Fruit_tree_forms

    Single-stemmed trees planted at an angle (usually 45°), with fruiting spurs encouraged to form along the stem. Any side branches are removed by pruning. Any side branches are removed by pruning. Cordons take less space and crop earlier than most other forms, so more varieties can be grown in a given space, but yields are smaller per tree. [ 3 ]

  4. Anthocleista grandiflora - Wikipedia

    en.wikipedia.org/wiki/Anthocleista_grandiflora

    [1] [2] [3] It is commonly known as the forest fever tree. It is a tall, slender tree up to 30 m with a preference for forests in high rainfall areas. The leaves are very large, up to 100 cm x 50 cm, arranged in terminal clusters.

  5. Tree line - Wikipedia

    en.wikipedia.org/wiki/Tree_line

    The tree line follows the line where the seasonal mean temperature is approximately 6 °C or 43 °F. [12] [6] The seasonal mean temperature is taken over all days whose mean temperature is above 0.9 °C (33.6 °F). A growing season of 94 days above that temperature is required for tree growth. [13]

  6. Tree height measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_height_measurement

    The base of the tree is where the projection of the pith (center) of the tree intersects the existing supporting surface upon which the tree is growing or where the seed sprouted. [1] [2] If the tree is growing on the side of a cliff, the base of the tree is at the point where the pith would intersect the cliff side. Roots extending down from ...

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  8. Valley fever is a growing risk in Central California; few ...

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  9. Hevea brasiliensis - Wikipedia

    en.wikipedia.org/wiki/Hevea_brasiliensis

    In the wild the tree can reach a height of up to 43 metres (141 ft). The white or yellow latex occurs in latex vessels in the bark, mostly outside the phloem. These vessels spiral up the tree in a right-handed helix which forms an angle of about 30 degrees with the horizontal, and can grow as high as 15 metres (49 ft). [3]