Flowers of the American West. A selection of plates from the 1915 “Field book of western wild flowers” which was written by Margaret Armstrong in collaboration with John James Thornber who was a professor of botany in Arizona.

"Orange Mariposa Tulip" (Calochortis Kennedyi). Frontispiece.
“Orange Mariposa Tulip” (Calochortis Kennedyi). Frontispiece. Page 6. Collection of the New York Botanical Garden. Metropolitan New York Library Council, digitalizing sponsor. In the public domain due to age. via https://www.biodiversitylibrary.org/item/126806#page/6/mode/1up
fieldbook00arms_0031
“Arrowhead” (Sagittaria latifolia). Page 31. Collection of the New York Botanical Garden. Metropolitan New York Library Council, digitalizing sponsor. In the public domain due to age. via https://www.biodiversitylibrary.org/item/126806#page/29/mode/1up
Wild Onion" (Allium acuminatum).
“Wild Onion” (Allium acuminatum). Page 41. Collection of the New York Botanical Garden. Metropolitan New York Library Council, digitalizing sponsor. In the public domain due to age. Via https://www.biodiversitylibrary.org/item/126806#page/41/mode/1up
"Wild Onion" (Allium bisceptrum and Allium serratum).
“Wild Onion” (Allium bisceptrum and Allium serratum). Page 45. Collection of the New York Botanical Garden. Metropolitan New York Library Council, digitalizing sponsor. In the public domain due to age. Via https://www.biodiversitylibrary.org/item/126806#page/43/mode/1up

Art Nouveau era book covers all tricked out in gold. American. Margaret Armstrong, designer (1867-1944).

"Millionaire Households and their Domestic Economy."
“Millionaire Households and their Domestic Economy.” Mary Elizabeth Carter, author. Published in 1903 by D. Appleton And Company, New York. In the public domain. via http://www.johncoulthart.com/feuilleton/2010/02/01/margaret-armstrong-book-designs/
"Days Off and Other Digressions."
“Days Off and Other Digressions.” Henry Van Dyke, author. Published in 1907 by Scribners, New York. Image © 2008 The Athenæum of Philadelphia. Fair use license. via http://www.athenaonline.org/Artbound/case7.html
"Adzuma."
“Adzuma.” Sir Edwin Arnold, author. Published in New York by C Scribner’s Sons in 1893. Image © 2019 Copyright The New York Society Library. Fair use license. via https://www.nysoclib.org/blog/art-book-margaret-armstrong-and-her-bindings