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Plant associations: American Aspen, Common Aspen, Cypress, Fig, Frankincense, Hibiscus, Hyssop, Mint, Nettle (greater), Oak, Olive, Peppermint, Pomegranate, Red Poppy, Saffron (Spanish), Poppy (white)
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They contain the poplar Or aspen ( Populus tremuloides), balsam poplar (Populus balsamifera), and paper or canoe birch (Fetula papyrifera.)