lunuluria, put right
heard as lunuluria
spelled lunularia
Lunularia: three u's, then the -aria ending.
What the ear did
The fourth vowel takes the stress off and hands it to the syllable after, so it flattens. Genus names ending in -aria are everywhere in botany, and none of them is spelled -uria.
L-U-N-U-L-A-R-I-A
The full entry for lunularia covers the name itself.