See "slide notes" for comments/contexts/quotes from residents! Presentation based on a talk I gave for the URP 2013 Gold Coast Seminar Series, Griffith University, February 2013. The talk introduces informal urban greenspace, its definition and how I studied it. I then describe the ecology and use of some IGS types in more detail (street verges, gaps, vacant lots, railway verges and waterside areas). The residents of Brisbane and Sapporo voice their opinion on informal greenspace. I end the presentation with some thoughts on methodology. Contact: email@example.com - http://www.treepolis.org - this presentation is under a CC-BY-SA license.