West: PSW 491. Cent.: Buch.-Ham. s.n. (type of B. dioica); Wall. s.n. (type of B. tenella); Wall. 3682A (type of B.amoena); SSW 6508. East: Stainton 1407.
2000-2900 m; Himalaya (Punjab to Sikkim), Assam.
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