noun
Russian false yellow lupine
A plant species (Thermopsis lupinoides) native to East Asia, including Japan. The name is usually written in katakana.
海岸近くでセンダイハギが群生しているのを見つけた。
I found a colony of Russian false yellow lupine growing near the coast.
The name likely derives from 仙台 (Sendai) and 萩 (hagi, bush clover), though the exact origin is uncertain. The katakana spelling is standard for this plant.