Flower and Thorn

A young flower hunter gets embroiled in the succession politics of the Sultanate when she must retrieve the rarest and most powerful magical flower after giving it to the wrong hands, in Rati Mehrotra's Flower and Thorn.
Irinya has wanted to be a flower hunter ever since her mother disappeared into the mysterious mist of the Rann salt flats one night. Now seventeen, Irinya uses her knowledge of magical flowers to help her caravan survive in the harsh desert. When her handsome hunting partner and childhood friend finds a priceless silver spider lily—said to be able to tear down kingdoms and defeat entire armies—Irinya knows this is their chance for a better life.
Until Irinya is tricked by an attractive impostor.
Irinya's fight to recover the priceless flower and fix what she's done takes her on a dangerous journey, one she's not sure she'll survive. She has no choice but to endure it if she hopes to return home and mend the broken heart of the boy she's left behind.