Bloodblossom - I honestly don't know why they call it that, because the blossoms are white or cream. Can be used as a blood thinner in potions. Maybe Fred and George could experiment with it for Nosebleed Nougats.
Strawberry Blossom - Although not my favorite jam, I love eating a ripe and juicy strawberry. I would use these in a Euphoria potion probably. Just the smell makes me think "summer."
Moonlace - Although this particular specimen is rather dry and tinted with green, it is normally white and has a little glow around it. Planting must be done in the light of the moon though. In its healthy state, it has a very soft texture. But when dried, it is EXTREMELY rough. I would use a healthy specimen for lotions, but I might prank someone by giving them a sample that was made with a dried bit of moonlace.
Purple Pixie Bells - A light purple bloom often used bye pixie's as a drinking cup. They can be used by wizards/witches to trap pixies by simply casting an engorgement charm on the flower, filling it with honey, and waiting for the pixie(s) in the area to start gorging themselves. After that, the wizard/witch merely has to shrink the bloom, thereby shrinking the pixie(s) and then carry the cup away and deposit it somewhere else.
African violets - Very deep purple flowers that are very soft to the touch. Though infamous for its reputation of being very difficult to care for, it is the only flower my mom has ever been able to keep alive for an extended period of time. Because it is so soft and lovely looking, I would probably use the flowers in either a skin softener or love potion.