Liriope Lour.
Engl.: lilyturf.

Liriope graminifolia

Liriope graminifolia (L.) Baker.
Engl.: lilyturf.
Bot. syn.: Dracaena graminifolia L.

Liriope muscari

Liriope muscari (Dcne.) Bailey.
Engl.: liriope, big blue lilyturf.
Bot. syn.: Liriope platyphylla F. T. Wang & T. Tang.

Liriope spicata

Liriope spicata Lour.
Engl.: creeping lily-turf, creeping liriope.
Bot. syn.: Convallaria spicata Thunb., Flueggea spicata Schultes.

I have no articles for this botanical term, but there might be some for the next level down (if found).