Shloka 14
Bhṛgu–Bharadvāja-saṃvāda: Vānaprastha-parivrājaka-ācāra, Abhaya-dharma, and Lokānāṃ Vibhāga (Śānti-parva 185)
पुण्यापुण्यैस्तथा गन्धैर्धूपैश्व विविधैरपि । अरोगाः: पुष्पिता: सन्ति तस्माज्जिप्रन्ति पादपा:
puṇyāpuṇyais tathā gandhair dhūpaiś ca vividhair api | arogāḥ puṣpitāḥ santi tasmāj jighranti pādapāḥ ||
भारद्वाज बोले—पवित्र और अपवित्र गन्धों से तथा नाना प्रकार के धूप की गन्ध से भी वृक्ष नीरोग होकर फूलने-फलने लगते हैं; इसलिए सिद्ध है कि वृक्ष भी सूँघते हैं।
भरद्वाज उवाच
Educational Q&A
The verse argues by observable effect (health and blossoming due to fragrances and incense) that trees possess a sensory capacity—specifically smell—thus extending consideration of sentience beyond humans and animals.
In a didactic discussion in Śānti Parva, Bharadvāja presents an inference: since trees respond beneficially to scents and fumigation, it is reasonable to conclude that they can smell.