This is quite an old painting that was supposed to be the first in a floragraphy series. I say ‘supposed’ because the series never happened.
So, Acacia is the symbol of hidden love. There’s a fuckton of symbolism in this (because I love symbolism an amount equal to the fuckton); she has flowers and thorns coming out of her mouth to symbolise how stupid and superflous all words we say to our secret affections are, and how we’re worried that we might accidentally drive them away in the process. Etcetera.