Sentence:  They plunged into the narrow path between the tall <WSD>sumach</WSD> bushes, and were at once hidden in the gloom. 
Meaning of the word marked with <WSD> tags:  Any of various shrubs or small trees of the genus "Rhus" and other genera in Anacardiaceae, particularly the (elm-leaved sumac), (Sicilian sumac), or (tanner's sumac) ("Rhus coriaria").