lewnularia, spelled the English way
heard as lewnularia
spelled lunularia
The sound is right, the letters are Latin: lunularia.
What the ear did
English writes this vowel ew in dew, new and stew, and u in lunar, tuna and duty. The Latin name uses the plain u, and the y glide many speakers put after the l is not written at all.
L-U-N-U-L-A-R-I-A
The full entry for lunularia covers the name itself.