大和草

Literally, “Yamato grass”, 大和(やまと) (Yamato) + 草(くさ) (kusa, “grass, plant”). The kusa changes to gusa as an instance of rendaku (連濁).

• IPA^(key): [ja̠ma̠to̞ɡɯ̟sa̠]

大和(やまと)草(ぐさ) or 大和草(ヤマトグサ) • (yamatogusa) 

1. Theligonum japonica

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