Sentence:  Only the memory of the waterfall, with its amazing <WSD>fernery</WSD>, like a hanging garden above the rocks of the gorge, was preserved in Mrs. Gould's water-color sketch; she had made it hastily one day from a cleared patch in the bushes, sitting in the shade of a roof of straw erected for her on three rough poles under Don Pépé's direction. 
Meaning of the word marked with <WSD> tags:  An area naturally abundant in ferns.