Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 20
Sanskrit:
उत्स्रोतसस्तम:प्राया अन्त:स्पर्शा विशेषिण: ॥ २० ॥
ITRANS:
utsrotasas tamaḥ-prāyāantaḥ-sparśā viśeṣiṇaḥ
Translation:
All the immovable trees and plants seek their subsistence upwards. They are almost unconscious but have feelings of pain within. They are manifested in variegatedness.