Astanga Hrudaya
द्विधा ख्यातं च तन्मूलं श्यामं श्यामारुणं त्रिवृत् । त्रिवृदाख्यं वरतरं निरपायं सुखं तयोः ॥ ३ ॥
Its root is known to be of two kinds; Syama (blue) (known as syama) and syamaruna (bluish red) known as Trivrt – Operculina turpethum. Among the two varieties, trivṛdākhyaṃ – Operculina turpethum is very good, harmless and easy (to administer).
english translation
dvidhA khyAtaM ca tanmUlaM zyAmaM zyAmAruNaM trivRt । trivRdAkhyaM varataraM nirapAyaM sukhaM tayoH ॥ 3 ॥
hk transliteration by Sanscript