Brasenia schreberi shine sunan kimiyya ga nau'in tsire-tsire na ruwa wanda aka fi sani da garkuwar ruwa. Tsire-tsire ne mai iyo mai zagaye, ganyaye masu sheki masu sheki wanda zai iya girma har zuwa santimita 15 a diamita. Ita wannan shuka ta fito ne daga Arewacin Amurka kuma ana iya samunta a cikin tafkuna, tafkuna, da rafuka masu tafiya a hankali. Sunan "Brasenia schreberi" ya samo asali ne daga masanin ilimin halittu na Jamus Johann Christian Daniel von Schreber, wanda ya fara bayyana nau'in a cikin 1789.