polypodium
Could not find polypodi in Logeion dictionaries.
polypodi Noun: neuter genitive singular of polypodium
pŏlypŏdĭum (-ĭon), ii, n., = πολυπόδιον,
- a kind of fern, polypody, Plin. 16, 44, 92, § 244; 26, 12, 75, § 122.
pŏlўpŏdĭum, ĭī, n. (πολυπόδιον), polypode [plante] : Plin. 16, 244.