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Pine - Wikipedia, the free encyclopedia
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The number of leaves per fascicle, the length of needles, the number of sides of the needles (only Pinus monophylla has a round needle), the distribution of stomata (waxy white specks on the leaf surface), and the color and stiffness of the needles can all be useful characters for identification.
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they can be separated by rubbing the fascicle in the hand (see photo). Fascicles 4-7.5 cm long, about 1 mm thick; sheath fully persistent (unlike all other pines in subgenus Strobus). Seedlings have only juvenile ... The species is unique in Pinus in not showing a resting stage at 6-12 months (hence the ill-defined umbo);
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Fascicle. Cluster of needles borne on a minute determinate short shoot in the axil of a primary leaf (bract); e.g. Pinus. Fascicle Sheath - Closely ...
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Fascicle Sheath. Closely imbricated bud scales at the base of the fascicle of needles; e.g., Pinus. ... Determinate. No continued growth; shoot with leaves drops as a unit; e.g., Pinus fascicle.
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In many areas Pinus is a forest dominant, either early successional and thus weedy or often longer-lived and part of climax forest. ... Fascicle-sheath measurements are based on fully developed, unbroken sheaths, not on sheaths as they later break up.
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[23] in another Pinus species (P. sylvestris). These researchers reported that developing needle fascicles suppose a high contribution to the IAA content ...
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