Every rated Liriope record is fire-resistant — 3 of 4 records, including the genus rated as a group; none is condemned.
These counts describe the cited records — 4 records carrying
22 evidence rows from 17 cited
sources; they do not make one verdict for the genus.
Corpus context. Liriope is the directory's #214 largest of
550 genus groups: 4 records carrying
22 evidence rows from 17 cited
sources, recorded as groundcover , hardy across USDA zones 4–4.
Those are corpus facts, not a whole-genus flammability claim.
More about Liriope: Wikipedia
— external references; not evidence sources.