Asclepias verticillata wani nau'in tsiro ne a cikin dangin milkweed (Asclepiadaceae) ɗan asalin Arewacin Amurka. Wanda aka fi sani da ƙwanƙarar milkweed, ɗan itace ne mai ɗanɗano mai ɗanɗano wanda yawanci yana girma har zuwa 60 cm tsayi kuma yana da ƙanana, farare ko furanni-rawaya-rawaya waɗanda aka shirya a cikin masu tsiro tare da mai tushe. An san shukar yana jan hankalin masu yin pollinators iri-iri, musamman malam buɗe ido, sannan kuma tsutsa ce ga malam buɗe ido.