Cyperus alopecuroides

 Images by Suresh Sharma - validation by J.M.Garg

Motha patera;

The global distribution of this species includes tropical Africa (Benin, Burkina Faso, Ghana, Mali, Mauritania, Niger, Nigeria, Senegal, Togo, Egypt, Sudan, Ethiopia, Somalia, Eritrea, Kenya, Tanzania, Malawi, Botswana, Swaziland, South Africa, Cape Verde, Comoros and Madagascar), the Middle East (Israel, Lebanon, Yemen, and Saudi Arabia), tropical and temperate Asia (Sri Lanka, India, Indochina) and northern Australia. It has apparently been introduced to Florida as well as the Leeward and Windward Isles (The Board of Trustees of the Royal Botanic Gardens, Kew 2012). 
This species is commonly found growing on moist and shady places, on alluvial mud, on the margins of ponds, lakes, streams and river beds. 

(050409SCS1-3) - Is it Cyperus alopecuroides : 2 posts by 2 authors. Attachments (3)
Cyperus alopecuroides. Am I correct?
Hindi name: Motha patera
Sonepat, 4th April 09 in a marshy patch. 
Link for details:
But I think experts only can confirm.
Cyperus scariosus ? : 8 posts by 1 author. Attachments (1)- 3 MB. 
Cyperus scariosus ?

Attachments (1)- 3 MB.  

Attachments (1)- 4 MB. 

I need a specimen to identify this.

Also check comparative images at Cyperus

I have confirmed its Cyperus alopecuroides


The Plant List  GRIN  Flora of Pakistan  Flora of North America  IUCN Red List (LC)  Cyperus alopecuroides - Google Image Search

Flora of Ranga Reddi District Andhra Pradesh, India By T. Pullaiah, M. Silar Mohammed (2000- Juncellus alopecuroides (Rottb.) Clarke- Description & Keys- Juncellus alopecuroides, pygmaeus, laevigatus