tutsan
Concise Oxford English Dictionary © 2008 Oxford University Press:
tutsan /ˈtʌts(ə)n/
▶noun a St John's wort with large aromatic leaves and a berry-like fruit, formerly used medicinally. [Hypericum androsaemum.]
– origin ME: from Anglo-Norman Fr. tutsaine ‘all wholesome’.
'tutsan' also found in these Oxford entries:

