Sentence:  The corridor stinks of sweat and cigarette smoke, and I daringly open the window a little. The freshest air floats in, smelling of <WSD>sappy</WSD> grasses, the delicate pollens of wild flowers, the resins of the pine forests; hinting atthe chill blue scent of distant snows. 
Meaning of the word marked with <WSD> tags:  Having (a particularly large amount of) sap.