19th Century Cyanotype Specimen of Agastache and Eupatorium

Full prompt

Authentic nineteenth-century cyanotype photogram on heavy textured watercolor paper, rendered in layered shades of deep Prussian blue and indigo. Pressed specimens of Agastache and Eupatorium are silhouetted against the dark blue background, their serrated leaves and square stems producing delicate white negative silhouettes with translucent venation patterns where light penetrated the foliage. In the lower right corner, faint white handwritten botanical nomenclature and collection dates evoke an antique Victorian herbarium, 9:16 aspect ratio.