They are made especially for my boyfriend's family house, they all will be framed this week with paspartout and matte glass custom made frames and all six of them will happily hang on the wall. You are welcome to enlarge each of them to see it closer.
White Nights Watercolor on 300 gram W&N paper, some white gouache here and there, some candles, a little sponge and a white gel pen.
Each of them is about 26x20cm
No specific reference but I did looked on lots of flower photos for inspiration such as this , this and this .