Adventitious rooting of eight conifers into a volcanic tephra deposit

Abstract
During the second growing season after the 1980 eruption of Mount St. Helens, AbiesamabilisDougl. ex Forbes, A. procera Rehd., and Pinusmonticola Dougl. ex D. Don produced adventitious roots into tephra, the first known instance of rooting by these species. Abieslasiocarpa (Hook.) Nutt., Chamaecyparisnootkatensis (D. Don) Spach, Thujaplicata Donn. ex D. Don, Tsugaheterophylla (Raf.) Sarg., and T. mertensiana (Bong.) Carr. also adventitiously rooted; Pseudotsugamenziesii (Mirb.) Franco did not.

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