Top left: Swallowtail butterflies, probably either Old World swallowtails (Papilio machaon) or Eastern Tiger swallowtails (Papilio glaucus). They're flying next to violets, possibly American Dog Violets (Viola labradorica) or Wood Violets (Viola odorata).
Top Middle: A painting of a blue iris. Facebook says it's by Igor Levashov, who paints flowers. Walmart sells this painting and says it's by someone named Patrycja Skorupska, who I can't find anything about.
Top Right: A rose that has been recolored to a point where I can't identify it. Probably a hybrid tea rose.
Second Row Left: Rosa 'Just Joey'. A hybrid tea rose cultivar.
Second Row Middle: Possibly Rosa 'Chrysler Imperial' or Rosa 'Ingrid Berman'. Also hybrid tea roses.
Second Row Right: Also probably a hybrid tea rose, but it's been dyed so I can't identify it. Roses are hard.
Third Row Left: Japanese Camillia (Camillia japonica). Single Guilio Nuccio cultivar.
Third Row Middle: Definitely Deutzia. But I can't find any deutzia in that color. I think it's Slender Deutzia (Deutzia gracilis). They're white flowers, and I think the picture was recolored or the flowers were dyed.
Third Row Right: Those look like Single Late Tulips. There are multiple different cultivars coming out of the same plant, so I think they're either fake flowers or dyed.
Fourth Row Left: Japanese Camillia (Camillia japonica). Tricolor cultivar.
Fourth Row Middle: Those look like Daylilies (Hemerocallis). They're not actualy lilies but I'll tag them like they are. It might be an Angel Gown cultivar.
Fifth Row Left: Pink flowers are Garden Cosmos (Cosmos bipinnatus) 'Gloria' cultivar. Yellow flowers might be black-eyed Susans (Rudbeckia hirta).
Fifth Row Middle: African Daisy (Osteospermum). It's either recolored or dyed, so I can't tell the cultivar.
Fifth Row Right: Dutch Yellow Crucus (Crocus flavus).
Last Row Left: Some kind of Grandiflora rose. The white flowers come from a different plant that I can't identify.
Last Row Middle: Single late tulips (possibly of the French variety) or Darwin hybrids. Modern tulip cultivars used in bouquets are complex and difficult to identify, but it might be Tulipa 'Capri'.
Last Row Right: possibly Paperwhites/Bunch-Flowered Narcissus (Narcissus tazetta) or Cemetery Ladies (Narcissus x medioluteus).