White tree peonies by White

Minor White :: White tree peony (Jap.), mid 1950s-1960s; published 1968. [Photographs of tree peonies] at internet archive
Album photographs of tree peonies, published: 1968. Presented to the Massachusetts Horticultural Society in 1971 by William Gratwick.
Unsigned black-and-white photographs of black and white tree peonies by Nassos Daphnis, Minor White, and William Gratwick. The prints, which illustrate various species of tree peonies at different stages of their development, including embryo, bud, full flower, and seed pod, were probably made at the Gratwick nursery, Linwood Gardens, in Pavilion, New York, possibly in the mid-1950s and 1960s, and assembled by Gratwick ca. 1968. Gratwick had worked for Arthur P. Saunders, a chemistry professor at Hamilton College and the first significant breeder of peonies and tree peonies in America, who began hybridizing peonies in 1915; and when Saunders died in 1953, Gratwick inherited his stock of tree peonies. He moved them to his nursery in Pavilion, and continued his breeding work with a former New York artist, Nassos Daphnis, who had given up painting for botany in 1946.
Minor White :: White tree peony (Jap.), mid 1950s-1960s; published 1968. [Photographs of tree peonies] at internet archive

Album of photographs of tree peonies, published: 1968. Presented to the Massachusetts Horticultural Society in 1971 by William Gratwick.
Unsigned black-and-white photographs of black and white tree peonies by Nassos Daphnis, Minor White, and William Gratwick. The prints, which illustrate various species of tree peonies at different stages of their development, including embryo, bud, full flower, and seed pod, were probably made at the Gratwick nursery, Linwood Gardens, in Pavilion, New York, possibly in the mid-1950s and 1960s, and assembled by Gratwick ca. 1968. Gratwick had worked for Arthur P. Saunders, a chemistry professor at Hamilton College and the first significant breeder of peonies and tree peonies in America, who began hybridizing peonies in 1915; and when Saunders died in 1953, Gratwick inherited his stock of tree peonies. He moved them to his nursery in Pavilion, and continued his breeding work with a former New York artist, Nassos Daphnis, who had given up painting for botany in 1946.

quoted from Chicago Botanic Garden, Lenhardt Library at internet archive

Minor White :: White tree peony (Jap.), mid 1950s-1960s; published 1968. [Photographs of tree peonies] at internet archive
Minor White :: White tree peony (Jap.), mid 1950s-1960s; published 1968. [Photographs of tree peonies] at internet archive
Minor White :: White tree peony (Jap.), mid 1950s-1960s; published 1968. [Photographs of tree peonies] at internet archive
Minor White :: White tree peony (Jap.), mid 1950s-1960s; published 1968. [Photographs of tree peonies] at internet archive
Minor White :: Hira no yoki (white) and seedling, mid 1950s-1960s; published 1968. [Photographs of tree peonies] at internet archive
Minor White :: Hira no yoki (white) and seedling, mid 1950s-1960s; published 1968. [Photographs of tree peonies] at internet archive
Minor White :: Hira no yoki (white) and seedling, mid 1950s-1960s; published 1968. [Photographs of tree peonies] at internet archive
Minor White :: Hira no yoki (white) and seedling, mid 1950s-1960s; published 1968. [Photographs of tree peonies] at internet archive
Minor White :: Flowers, ca. 1973. Courtesy of Swann Galleries (Auction, May 21, 2015, #2385, Lot 348). | src Luminous Lint (LL/59561)
Minor White :: Flowers, ca. 1973. Courtesy of Swann Galleries (Auction, May 21, 2015, #2385, Lot 348). | src Luminous Lint (LL/59561)

Our note: the last image is identical as the Hira no yoki photograph above, so datation by Swann Galleries should amended. Maybe the photo was printed ca. 1973 but was clearly shot before 1968 (date of publication of the Gratwick album).

Hand-colored collotypes, 1890s

Ogawa Kazumasa :: Hærdaceous Pæony; Kazumasa Ogawa (Japanese, 1860 – 1929); 1896. Hand-colored collotype. | src The J. Paul Getty Museum
Ogawa Kazumasa :: Lily; Kazumasa Ogawa (Japanese, 1860 – 1929); 1896. Hand-colored collotype. | src Getty Museum
Ogawa Kazumasa :: Lily; Kazumasa Ogawa (Japanese, 1860 – 1929); 1896. Hand-colored collotype. | src J. Paul Getty Museum