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Jack Pine needles are in bunches of two, which spread apart in a "V". This is one of the main features that distinguish it from Scots Pine. |
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Here's a closer-up view of Jack Pine needles. If you look carefully at this photo, you can plainly see the spread-apart configuration of the needles. |
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Immature Jack Pine cones. |
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Notice how the cones grow directly from the branch, with no stem on the cone. Scots Pine cones have a short stem attaching them to the branch. |
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Yes, Jack Pine cones do open in fire. These cones were collected from an area that had a fire only a couple of weeks previously. |
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However, as evidenced by this un-charred cone (on an un-charred tree) still on the tree in an area which had not experienced a forest fire for many many years, the cones do not require fire to open. Good hot weather will do it. |
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Two pictures showing the overall shape and form of the Jack Pine. They are well-suited to alvar-type places (dry and rocky, with little ground water). |
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