瑠璃虎の尾

Literally, “azure tiger's tail”, compound of 瑠璃(るり) (ruri, “azure”) + 虎(とら)の尾(お) (tora no o, “tiger's tail”)

瑠(る)璃(り)虎(とら)の尾(お) or 瑠璃虎(ルリトラ)の尾(オ) • (ruri tora no o) 

1. azure speedwell, Veronica subsessilis

   Synonym: 虎の尾 (tora no o)

As with many terms that name organisms, this term is often spelled in katakana, especially in biological contexts (where katakana is customary).