Carex baccans

 An indigenous perennial occurs on wet slopes covered by open forests in the montane zone above 6000 ft elevations.  

Cyperus paniceus

Common native perennial grows along roadsides and open areas from lowlands to hills in both dry and wet zones.  

Cyperus cyperinus

Common native perennial occurs in open grassy places of the hill country.  

Cyperus platyphyllus

Rather rare indigenous perennial growing in large tufts in marshy places of low altitudes. 

Cyperus difformis

Common native annual widely distributed in wet places of all climatic zones. Often found in paddy fields.

Carex indica

Tall native perennial rather rare in wet lowland forests to higher hills. 

මූදු හාල්පන්[Mudu Halpan](Fimbristylis quinquangularis[Syn: Fimbristylis miliacea])

Common indigenous annual or apparently biennial of wet grassy places at low elevations. Often a weed in paddy fields. 

Schoenoplectiella juncoides [Syn: Schoenoplectus juncoides]

Common native tufted herb grows in wet places, often in paddy fields. 

Cyperus pilosus

Rather common native plant of moist low country to higher hills. Also in Intermediate zone.

Rhynchospora corymbosa

Common native plant occurs in open marshy areas and margins of paddy fields at low elevations. 

Fuirena umbellata

Common native perennial herb found on open wet or swampy places from sea level to about 1800 m a.s.l.

Cyperus richardii [Syn: Kyllinga bulbosa]

Common native perennial of grasslands, roadsides waste places and scrub lands, mainly in the dry lowlands.

Cyperus aromaticus [Syn: Kyllinga polyphylla]

An introduced weed native to the tropical Africa and Madagascar. According to the Flora of Ceylon Vol 5 it was only known from a place between Pussellawa and Ramboda at mile 28/10 along Kandy -Nuwaraeliya Rd (950 m a.s.l. ) in the Nuwaraeliya district. It is also noted that apparently it was a rather recent introduction. Since then (1985) it seems that it has become a widely distributed weed in paddy fields, marshes and roadsides, at least in the moist areas from lowland to the hill country (Personal observations). 

Umbrella papyrus/Umbrella sedge (Cyperus alternifolius)

An introduced tall perennial, native to the tropical Africa and Arabia. Widely cultivated as an ornamental and also escaped and naturalized in grassy places. 

මොට්ටු තණ[Mottu Tana] (Cyperus mindorensis [Syn: Kyllinga nemoralis/Kyllinga monocephala)

Very common grass like native perennial herb occurs in waste places, roadsides, home gardens and grass lands of both wet and dry lowlands up to mid hills(?)

Kyllinga melanosperma (Syn: Cyperus melanospermus)

An indigenous perennial  common on the grassy beds of the montane forests.

ඇට පන්[Eta Pan] (Lepironia articulata)

Leafless indigenous perennial occurs in saline swamps and back marshes along the coast.  Known only from Muthurajawela marshy land and along Hamilton canal in the Negombo area and from Caltura (Kalutara?) (Flora of Ceylon Vol 5) *

* Photographed at Diyawanna oya marsh land of Kotte,  probably introduced to that area since part of former wetland is now turned into the Baddagana biodiversity park and Bird Sanctuary. 

Actinoscirpus grossus [Schoenoplectus grossus]

Grass like native perennial weed grows in marshy places, both inland and near the coast.  Often occurs as large community. Culms used to make baskets and mats.