Among those who worked so ably to make Rochester eminently the "Flower city" of this continent, the name of Robert J. Donnelly stands prominent, and his death in that city on the 27th instant, will be deeply regretted, not only in the city for whose fame he did so much, but in many parts of the Union where his trade reached, and where he was so honorably known. His business embraced everything in the 'nursery trade, and was, we believe, one of the largest in the State of New York. He was born in Montreal, 1824, and settled in Rochester in 1839. He has been in ill health for some time.