Editing Cyperus (section)

==Ecology==
''Cyperus'' species are eaten by the [[larva]]e of some [[Lepidoptera]] species, including ''[[Chedra microstigma]]''.  They also provide an alternative food source for ''[[Bicyclus anynana]]'' larvae.<ref>{{cite journal |author1=Rinny E. Kooi |author2=Paul M. Brakefield |author3=William E. M.-T. Rossie |year=1996 |title=Effects of food plant on phenotypic plasticity in the tropical butterfly ''Bicyclus anynana'' |journal=[[Entomologia Experimentalis et Applicata]] |volume=80 |issue=1 |pages=149–151 |doi=10.1111/j.1570-7458.1996.tb00906.x|bibcode=1996EEApp..80..149K |s2cid=221678693 }}</ref> The seeds and tubers are an important food for many small [[bird]]s and [[mammal]]s.

''[[Cyperus microcristatus]]'' (from [[Cameroon]]) and ''[[Cyperus multifolius|C.&nbsp;multifolius]]'' (native to [[Panama]] and [[Ecuador]]) are possibly [[extinct]]; the former was only found once, in 1995, and the latter has not been seen in the last 200 years. The "true" papyrus sedge of [[Ancient Egypt]], ''C.&nbsp;papyrus'' subsp. ''hadidii'', is also very rare today due to draining of its wetland habitat; feared extinct in the mid-20th century, it is still found at a few sites in the [[Wadi El Natrun]] region and northern [[Sudan]].

Some tuber-bearing species on the other hand, most significantly the purple nutsedge, ''[[Cyperus rotundus|C.&nbsp;rotundus]]'', are considered [[invasive weed]]s in much of the world.