Life History/Reproduction

Mahonia aquifolium is the result of cross-fertilization and hybridization of M. repens (which is morphologically similar to M. aquifolium) and M. pinnata. The Oregon Grape has always been found in the Pacific Northwest, but was introduced into Europe 1822 and has become a very successful invasive species. Like many plants, the Oregon Grape produces blue berries that are consumed by mainly birds which are distributed to neighboring areas.Mahonia aquifolium Grapes: Courtesy of James Gaither Although the main way of reproduction is through the production of seeds, the Oregon Grape is also known to reproduce by root sprouts and stem layers. Self pollination is another mode of reproduction for M. aquifolium, and for many other plants as well. All plants though exhibit Alternation of Generations, and the Oregon Grape happens to be a dominate sporophyte since it is a plant that produces fruit. Alternation of Generations Diagram: Modified from Gallant's Biology Stuff

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