Grass ID

[Symbiate]

I recently had a spiky specimen pop up in my garden, spiky in terms of the arrangement of the grains on the end of each stem. Had no idea what it was or where it had come from, but I recently noticed the same grass growing at a nearby lake so no doubt I can thank a bird or two for planting mine .

Can anyone identify it for me? Is it native?

[shortly]

Its not a grass, it looks like Cyperus sp. Possibly C polystachyos at a guess.

[waterboy 2.0]

Definitely a sedge, but I'm useless with grasses and sedges for IDs

[Symbiate]

Its not a grass, it looks like Cyperus sp. Possibly C polystachyos at a guess.

Definitely a sedge, but I'm useless with grasses and sedges for IDs

Thanks guys, I'm hopeless at both identification and terminology for such plants so I appreciate the help.

Time for a few hours on Wikipedia and Google...

[tarenna]

Looks likely to be Cyperus polystachyos - http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Cyperus~polystachyos

[quarterflesh]

im not a fan of that stuff. makes getting to some water edges a pain in the ass literally