Bladdy Grass(Illuk)

Blady grass, also referred to as cogon grass or Japanese bloodgrass, is one of the species of grass that is found at Udawalawe. In Sri Lanka, this particular species of grass is known as "illuk" and it is also known as kunai grass in some parts of the world. The scientific name of this species is
Imperata cylindrica and it is a perennial grass native to certain parts of Asia, including Australia. According to Center for Aquatic and Invasive Plants of the US, blady grass is at present throughout the tropical and subtropical areas of the globe. 

This plant can reach even 10 feet tall and its leaves are 2 cm wide. Used by humans for traditional houses, the plant is known to be an important source of food for elephants. Blady grass is considered to be highly flammable and it is also regarded as a weed. According to Invasive Species Specialist Group (ISSG), blady grass is considered as one of the top ten worst weeds in the world and one of the chief reasons for this basis is that is can grow in numerous types of soil. 

References
http://www.fao.org/ag/agp/AGPC/doc/gbase/data/pf000261.htm
http://www.issg.org/database/species/ecology.asp?si=16
 http://plants.ifas.ufl.edu/node/199