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There he purposely bumped into Robertson Ay, who was sound asleep on top of one of the best rock plants, and Robertson Ay was very angry.

This was filled with a blue flower, a rock plant of some sort, and the overflow hung down the vent and spilled lavishly among the canopy of the forest.

Pretty rock plants, growing freely in ordinary soil.

The rock plants on the little island in the pond fell into shadow and some closed up their petals for the night.

The earth may be kept level, or heaped up at one or both ends, and a few stones added to make a tiny rockery, in which you can grow small saxifrages and other rock plants.