Hi Kathryn,

Thank you for reaching out to us about your seeds.  Do you have any other information or pictures that you could send us?  A picture or a description of the flower from where you got the seeds would be very helpful?  BTW, They are not hibiscus or moon flower seeds or morning glory seeds.

Thank you.
CSU Extension Master Gardener Desk

On further investigation, we have a theory.  You mentioned that you got these from a flower, not a pod or similar seed container. If that is the case, it seems most likely that these are flower parts and not actual seeds.  Specifically, we think these might be stamen from a datura (also known as moonflower or jimson weed). Stamen are the pollen producing part of the flower.  
Unfortunately, we cannot download pics from the internet here, but if you search for images of 'datura stamen', you should be able to compare with your image.  
Please let us know if you have any further questions.  Thank you for the interesting question!  We enjoyed trying to track this one down.
Sandra/Janet
Colorado Master Gardener 
Boulder Extension