Plates from Vol. 2 of Fantaisies Florales by Jean Pilters, published in the first decade of the 20th century in Jersey City, New Jersey by H.C. Perleberg
Many of these flower studies were not done by Pilters but by his colleagues. Plates 3, 5, and 9 are copies of plates from Die Pflanze in Kunst und Gewerbe by Anton Seder, published in two volumes in Vienna by Gerlach and Schenck (1886 and 1889).
This volume is in the collection of the Metropolitan Museum of Art’s Watson Library. These images are my own personal scans of the book.