Silky Oak -- Not obviously invading anything
? See this project:
http://www.ispotnature.org/projects/silky-oak
Pictures of a tree taken long before Rabelani's project was initiated, hence no tailormade observations. Along this dirt road in a farming area there are the occasional large Silky Oak, which I assume have been planted there.
Start at this location, where this tree is clearly visible on Google Streetview. Then drive up and down the De Tweede Spruit road with Google Streetview to get a rather good impression of the Silky Oaks at the side of the road. I cannot discern any baby trees, but I'm not too sure what they look like. Unfortunately the current Streetview version is in the middle of winter.
Number of individuals: Occasional along road.
Size class: 48 m, or >8 m.
