<i>A Manual of the North American Gymnosperms, exclusive of the Cycadales, but together with certain exotic species</i> . By David Pearce Penhallow, D.Sc., Mac- Donald Professor of Botany, McGill University, 8Svo, pp. viii + 374, with 48 text illustrations and 55 plates. Boston, Ginn &amp; Company, The Atheneum Press. 1907.
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