An affix comes after a word denoting an animal, a herb and a tree in Genitive -6th-Case in construction in the sense 'this is its part' (as well as 'this is its modification').,
By the word च in the sutra, the phrase तस्य विकारः is also read into the sutra.
Thus कपोतस्य विकारोऽवयवो वा = कापोतः 4.3.154 ॥ So also मायूरः, तैत्तिरः 'a modification, product or part of a peacock &c -- viz a fan &c.' So also ओषधिः as, मौर्वम् 'product of Murva i.e. ashes or the stalk of Murva'. So also वृक्ष, as, कारीरं meaning \the stalk or the ashes of Karira tree\.
In the subsequent sutras, both the words विकार and अवयव have governing force. But after words which denote non-animals, non-plants or non-trees, the affixes have only the sense of विकार ॥ This is a rather unique case of double anuvritti, not co-extensive in every respect.,