Kalmar "genus Lewisia" tana nufin rukunin tsire-tsire masu fure waɗanda suka fito daga yammacin Arewacin Amirka. Sunan wannan jinsin sunan Meriwether Lewis, wanda ɗan Amurka ne mai bincike kuma masanin halitta wanda aka sani da rawar da ya taka a balaguron Lewis da Clark. iyali Montaceae. An san waɗannan tsire-tsire da furanni masu ban sha'awa, waɗanda suka zo da launuka iri-iri, ciki har da ruwan hoda, ja, rawaya, da fari. Yawanci suna girma ne a cikin ƙasa mai duwatsu ko yashi a cikin tsaunukan tsaunuka ko na ƙasa, kuma wasu nau'ikan sun dace da girma cikin bushewa ko bushewar yanayi. tare da wasu halaye na zahiri da abubuwan da ake so na muhalli, kuma masana ilmin ilmin halitta da sauran masana suna amfani da shi wajen tantancewa da nazarin waɗannan tsirrai.