S. N.  Biswas, ?Three new taxa of Hypericum Linn. (Hypericaceae) from India, Nepal and Burma.?, Bull. Bot. Surv. India., vol. 29, pp. 53-58 (1987 publ. 1989) - illus., 1989.

S. N.  Biswas, ?A new variety of Hypericum hookerianum Wt. et Arn. from India.?, Bull. Bot. Surv. India, vol. 25, pp. 195-196 (1983 publ. 1985) - illus., 1985.

S. N.  Biswas, ?Hypericum griffithii Hook. F. et Thoms, ex Dyer emend. S. N. Biswas - a noteworthy flowering plant from eastern Himalayas.?, Bull. Bot. Surv. India, vol. 13, pp. 160-161 (1971 publ. 1972), 1972.

S. N.  Biswas, ?Hypericum assamicum S.N.Biswas (Hypericaceae) a new species from eastern Himalaya.?, Webbia, vol. 25, pp. 671-674 (1971), 1971.