Sentence:  Not a single one of those "<WSD>umbrageous</WSD> trees," of which our Mayor declaimed so feelingly, has yet been planted; ... They should protest against his withdrawal from that station, until the banks of the Monongahela and Duquesne Way are once more covered with "<WSD>umbrageous</WSD> trees," ... 
Meaning of the word marked with <WSD> tags:  Having shade; shady; having shade provided by thick foliage.