They are perennial herbs, the stem bases sometimes becoming woody, growing up to 80 cm (31 in) tall.[1] They have black glands on the leaves, petals, anthers, and usually the sepals.[4] The leaves are opposite and perfoliate with entire margins. They have 5 sepals, 5 yellow petals, 3 styles, and numerous stamens.[4][5][6]
^Biswas, S. N. (January 1971). "Hypericum assamicum S. N. Biswas (Hypericaceae) A new species from eastern Himalaya". Webbia. 25 (2): 671–674. doi:10.1080/00837792.1971.10669945.