Kalmar "bublet bladder fern" ya bayyana ba daidai ba ne ko kuskuren rubutawa. Duk da haka, akwai nau'in fern da ake kira "bulblet fern" wanda ke cikin jinsin Amauromyza.Bulllet fern wani nau'i ne na fern wanda ke haifuwa ta hanyar samar da ƙananan sifofi masu kama da kwan fitila a kan 'ya'yansa. Wadannan sifofi masu kama da kwan fitila, da ake kira "bulblets," a ƙarshe sun rabu da shukar iyaye kuma suyi girma zuwa sababbin ferns. -kamar sifa akan ganyen su wanda ke dauke da spores. Duk da haka, babu wani nau'in fern da ake kira "bulblet bladder fern."