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Contorta (lodgepole) pine is a small to medium sized pine tree, usually with twisted branches and paired needles. It is monoecious (both female and male parts on the same tree). Trees mature at approximately five years of age, though peak seed production occurs after eight to ten years. The seed cones take 15 months to mature and can contain up to 300,000 seeds/kilogram.<\/SPAN><\/P>

Mountain pine is a small-to-medium sized, multi-stemmed tree with dark brownish-grey bark, which peels in small thin flakes. The foliage is often dense with needle-like leaves occurring in bundles of two. The needles are dark green, rigid and curved. The seeds from both species are very small and light and are capable of spreading long distances with the wind. As a result, wilding offspring of both species are capable of rapid invasion of land with low grazing intensity. This leads to significant impacts on native ecosystems, particularly those with low-stature vegetation. Existing plantings of these two species acts as seed sources for ongoing wilding spread.<\/SPAN><\/P>

It can be difficult to successfully control or manage the spread of wilding conifers over the long-term if the seed source is not removed or appropriately managed and contained. These two conifers have very limited commercial value. It is therefore appropriate to specify these organisms as pests in their own right.<\/SPAN><\/P>

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