1. Preserved Red Iris Flower found in Elona. The Frog hints that it is a sign of Gwen's status.
2. The Iris Flower survived the searing somehow...one logical way it could have done so is if it held some magical property to ward off the deadly magics of the searing.
3. If the Red Iris Flower has some magical defensive property against the searing, it may be able to protect someone in posession of it against the searing.
4. We all know Gwen collected LOADS of Red Iris Flowers, perhaps having them enabled her to survive the searing using their magical properties. (maybe her crown of flowers was made of/held Iris Flowers)
5. Gwen's mother was an herbalist, one who used plants and herbs to heal the sick and injured.
6. Perhaps Gwen's mother (or Gwen herself using her mother's tools) made a herbal mixture using the Red Iris Flower as the main ingredient. If it had magical defensive properties against the searing, perhaps whoever used the herbal mixture would be defended against it.
*Note: People are saying Gwen is a mesmer because there is a picture of (what is believed to be) her in the new magazine wearing what appears to be green mesmer clothes. One of the things Gwen says in pre-searing to you is:
"When I grow up, I'm going to be a hero like my daddy. I'd like to be a warrior, but the mesmers' outfits are nicer, don't you think?"
So maybe she is a mesmer, maybe she's a warrior/mesmer, maybe she's just a warrior in mesmer's clothing...or maybe something totally different.
Thanks for reading my ramblings, and I hope they make sense to soem of you!

PS - Is that a small flower in gwen's hair in the illustration of her in the new magazine?! O_o (God she's hot)*fap*fap*
PPS - "EYE" of the North! Red "IRIS" Flower! OMG!!!!!!
*is dragged off into Sardelac Sanitarium*