What's this plant, please?

fishb8, Dec 4, 4:42pm
https://trademe.tmcdn.co.nz/photoserver/full/687783773.jpg https://trademe.tmcdn.co.nz/photoserver/full/687783676.jpg
Saw them outside Waikato Hospital in big planters - almost like flax leaves

nonumbers, Dec 4, 4:51pm
Iris of some sort.

maclad, Dec 4, 5:08pm
Dieties, sorry not sure which one, but they do self seed and need control.

harm_less, Dec 4, 5:09pm

groovydad, Dec 4, 9:57pm
Pain in the ass plants unless you have a very big area and want to fill it. Flowers dont last in water and plants take over. Ive spent SO much time getting rid of these!

floydandu2, Dec 5, 11:47am
Self-seed y'say? I think these would look good covering my otherwise-useless bank.

docsportello, Dec 5, 11:55am
South African wild Iris (Dieties). Robust, drought tolerant, hard to kill.

wasgonna, Feb 1, 8:52am
Councils find them real good so the above description is probably why.