(Amended by the Council of OPTIMA by decision of 10.3.1978)

A.
1. Prizes will be awarded every three years to the authors of the best papers or books on the phytotaxonomy of the Mediterranean area published in the preceding three-year period.
2. The prizes will take the form of silver medals.
3. The prize winners will be selected by a Prize Commission and its recommendations will be submitted to the Council of the Organization for ratification and approval.
4. The prize will be awarded at a triennial meeting of the Organization.
5. Normally, one prize is available for each year of the triennium; the Prize Commission is free however to propose that in single years more than one prize, or no prize at all, be attributed.
6. Both members and non-members are eligible to submit papers or books for consideration by the Prize Commission.
7. No current member of the Prize Commission or International Board will be eligible for the prize.

B.
1. A prize will be awarded every three years to a botanist who, by his or her activity, is considered to have made an outstanding contribution to the phytotaxonomy of the Mediterranean area.
2. The prize will consist of a gold medal.
3. The prize winner will be selected by a Prize Commission and its recommendation will be submitted to the International Board of the Organization for ratification and approval.
4. The prize will be awarded at a triennial meeting of the Organization.
5. No member of the Prize Commission will be eligible for consideration.