They are the visual representation of the spirits passed on. Upon collecting these flowers you will be able to return to the spirits room and can buy the icebreaker.
Hot to get Spritflowers in Spiritfarer:
The initial step is to locate Gwen after she disembarks from the boat at Villa Maggiore. Additionally, ensure that you have completed her room. Subsequently, escort her back to the boat, as she will provide you with the next mission.
Now sail to the ‘EVERDOOR’
Gwen will now leave you and you will go through a short platforming section.
After completing all these steps, return to Gwens’s room to receive the spirit flower.
That’s pretty much it. I hope you found this guide helpful. Do let us know if you find any trouble getting the spirit flower.