Charak Samhita
मूलं तु द्विविधं तस्याः श्यामं चारुणमेव च । तयोर्मुख्यतरं विद्धि मूलं यदरुणप्रभम् ॥७॥
॥ Types of Trivrita॥ Roots of the plant Trivrita are of two types. The one that is black (shyama) is more beneficial than the other blackish red one.
english translation
mUlaM tu dvividhaM tasyAH zyAmaM cAruNameva ca । tayormukhyataraM viddhi mUlaM yadaruNaprabham ॥7॥
hk transliteration by Sanscript