Epilobium hirsutum shine sunan kimiyya na shuka wanda aka fi sani da "gashi willowherb" ko "babban willowherb". Tsire-tsire ne na shekara-shekara wanda asalinsa ne a Turai, amma kuma an gabatar da shi zuwa wasu sassan duniya. Kalmar "epilobium" ta samo asali ne daga kalmomin Helenanci "epi" ma'ana "kan" da "lobos" ma'ana "pod", yana nufin sanya kwas ɗin iri akan shuka. "Hirsutum" kalma ce ta Latin da ke nufin "mai gashi" ko "shaggy", wanda ke kwatanta ganyen shuka da mai tushe.