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H.  Hara, ?Monotropastrum globosum H. Andres?, in Iconographia Plantarum Asiae Orientalis, vol. 4, Tokyo: Shunyodo Shoten, 1941, pp. 327 - 328.

H.  Hara, ?New or noteworthy flowering plants from eastern Himalaya (4)?, J. Jap. Bot., vol. 40, pp. 100 - 102, 1965.

H.  Hara, ?New or noteworthy flowering plants from eastern Himalaya (1)?, J. Jap. Bot., vol. 36, pp. 78 - 80, 1961.

H.  Hara, ?A new species of Cotylanthera (Gentianaceae) from Philippines, with a conspectus of the genus?, J. Jap. Bot., vol. 50, pp. 321 - 328, 1975.