Hippuris vulgaris

From LSJ

λόγος τοῦ Θεοῦ οὐ δέδεται → the word of God will not be dishonoured, the word of God will not be dishonored

Source

Wikipedia EN

Hippuris vulgaris

Hippuris vulgaris (from Greek: ἵπποςhorse and οὐράtail), known as mare's-tail or common mare's-tail, is a common aquatic plant of Eurasia and North America ranging from Greenland to the Tibetan Plateau to Arizona. It prefers non-acidic waters.