BB,
Turf at Adelaide Oval is definitely Santa Ana couch. It gets over seeded with Perennial Rye Grass for the football season. I have seen that recently Santa Ana is now being marketed as Nullabor Couch.
There are some more shade-tolerant cultivators in the US that claim more shade tolerance (Tif Grand, Celebration), but I think the only cultivator over here marketed is Plateau Couch. That being said it is still going to need 6+ hours of unfiltered sunlight per day to be healthy and dense, particularly with low heights of cut (<15mm).
Simon
