Art Nouveau iris, taken form Maurice Pillard’s “Etude de la plante: son application aux industries d’art: pochoir, papier peint, etoffes, céramique, marqueterie, tapis, ferronnerie, reliure, dentelles, broderies, vitrail, mosaïque, bijouterie, bronze, orfévrerie” which was printed in Paris in 1903 by the Librairie Centrale des Beaux-Arts.

“Iris Germanique, plan de la fleur.” Page 39/image 44. Collections of and digitalized by the Getty Research Institute. In the public domain due to age. via https://archive.org/details/gri_33125005959479/page/n44/mode/1up
“Iris Germanique.” Figure 37, page 44. Collections of and digitalized by the Getty Research Institute. In the public domain due to age. via https://archive.org/details/gri_33125005959479/page/n44/mode/1up
“Iris Germanique. Couronnement de grille en fer forgé.” Figure 39. Page 46. Collections of and digitalized by the Getty Research Institute. In the public domain due to age. via https://archive.org/details/gri_33125005959479/page/n46/mode/1up