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- Betula pumila (category Betula)Synonyms: Betula borealis Spach Betula glandulifera (Regel) B. T. Butler Betula glandulosa var. glandulifera (Regel) Gleason Betula glandulosa var. hallii (Howell)5 KB (458 words) - 15:19, 29 February 2024