Agni Purana 228.20

228.20

drumāṇāṃ śvetapuṣpāṇāṃ gagane ca tathā dvija /
drumatṛṇodbhavo nābhau tathā ca bahubāhutā //

trees with white flowers, and likewise [flying] in the sky, O twice-born;
trees and grass growing in the navel, and having many arms;