(1867 - 1944)
Margaret Neilson Armstrong was active/lived in New York. Margaret Armstrong is known for wildflower illustration, graphic artist, book cover art.
Biography Margaret Armstrong
Active in New York and Europe and the Far West, Margaret Armstrong was an author-illustrator for "Scribners" and "The Century" magazines. With writer J.J. Thornber, she did 540 illustration for his text for "Field Book of Wildflowers."
Source: "An Encyclopedia of Women Artists of the American West" by Phil Kovinick and Marian Yoshiki-Kovinick