Kalmar "Pyrola americana" tana nufin nau'in tsire-tsire da ke cikin dangin Ericaceae, wanda aka fi sani da Amurka Wintergreen ko Amurka pyrola. Tsire-tsire ne na shekara-shekara wanda asalinsa ne a Arewacin Amirka, kuma yawanci yana girma a cikin daskarewa, wurare masu inuwa irin su dazuzzuka, dazuzzuka, da fadama. shirya a cikin wani rosette a gindin kara. Tushen yana girma zuwa kusan 10-30 cm tsayi kuma yana ɗaukar nau'in tseren siliki ɗaya na fari ko furanni ruwan hoda. An san shukar da kayan magani kuma ana amfani da ita a cikin magungunan gargajiya na gargajiya don magance cututtuka iri-iri, ciki har da cututtukan numfashi, cututtukan narkewa, da kumburi.