Variété commerciale: Topas

Voir article: “Breeding for a Hypericum perforatum L. Variety Both Productive and
Colletotrichum gloeosporioides (Penz.) Tolerant.” Gaudin, Myriam et al. Co-published simultaneously in Journal of Herbs, Spices & Medicinal Plants (The Haworth Herbal Press, an imprint of The Haworth Press, Inc.) Vol. 9, No. 2/3, 2002, pp. 107-120; and: Breeding Research on Aromatic and Medicinal Plants (ed: Christopher B. Johnson, and Chlodwig Franz)