作者: S. M. Wilson , T. A. Thorpe
DOI: 10.1007/978-94-011-0960-4_3
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摘要: In North America there are seven well recognized species of Picea which six native and one is introduced. The introduced species, P. abies L. Karst., used both in reforestation as an ornamental may have naturalized locally some areas (Little, 1986). pungens (Colorado blue spruce) has a small natural range primarily (Hosie, 1979). been broadly categorized two groups, based on hybridization abilities group, interbreeding occurs between mariana (black spruce), widely distributed from east to west, rubens (red found the east.