This vibrant Paraguayan airmail stamp features the Flor de Mburucuyá (Passiflora cerulea), the national passionflower, beautifully rendered against a bright yellow background. Issued as an adicional fundraising stamp supporting the Monument to Marshal López, it also commemorates the Centenary of the National Epic (1864–1870). The detailed floral artwork and bold typography make it a standout mid-20th-century thematic issue, highly sought after by collectors of Latin American flora and Paraguayan historical commemoratives. A handsome piece with strong topical appeal in both airmail and botanical collections.