Cyperus alternifolius (ছাতাঘাস)
Bengali Names: ছাতাঘাস, বাতচক্র ঘাস, জংলী প্যাপিরাস, জলবাঁশ (Chhata Ghas, Baatchakra Ghas, Jangli Papyrus, Jalbansh)
English Names: Dwarf Papyrus Grass, Umbrella Palm, Umbrella Papyrus, Umbrella Plant, Umbrella Sedge
Other Names: Souchet (French)
Scientific Name: Cyperus alternifolius L. (1767)
Synonyms: Cyperus alternifolius var. gracilis Pynaert, Cyperus frondosus Salisb., Cyperus onustus Steud., Cyperus racemosus Poir., Eucyperus alternifolius (L.) Rikli
Family: Cyperaceae (মেলে গোত্র)
Habit: Grass (তৃণ)
Date: 12 April 2017
Location: Boyra, Khulna, Bangladesh (22°50'3.37"N, 89°31'52.68"E)