Collon-cróh
Bosworth & Toller Anglo-Saxon Old English Dictionary - collon-cróh
According to the Old English Dictionary:
-cróg, es;
- collon-cróh
- m. A water-lily; nymphæa = GREEK :-- Colloncróh nymphæa, Wrt. Voc. 68, 20: Mone A. 461. Colloncróg nymphæa, Cot. 140. collon-croh