Biographies of American Seedsmen and Nurserymen Musser, Henry L.–Los Angeles, California–founded Aggeler and Musser Seed Company in 1896.  At one time the firm listed about one hundred and fifty kinds of shrub and tree seeds, and was a popular source for seeds and shrubs and trees in southern California.  In 1957, it combined with Germain’s Seed and Plant Company.
Sources:    CHSJ-Jul. 1968