One clump can produce 100 new shoots annually.

It was the proverbial match thrown by a careless smoker into a parched forest.

This suggests that it was a temporary clump of material that had disappeared by that time.

I will open rivers on the bare heights, and springs in the midst of the valleys. I will make the wilderness a pool of water, and the dry land springs of water.

I will open rivers in high places, and fountains in the midst of the valleys I will make the wilderness a pool of water, and the dry land springs of water.

This suggests that it was a temporary clump of material that had disappeared by that time.