Lichenology is a branch of mycology which deals with lichens. Estonian lichenology deals with Estonian lichens, but not only ...
Get-together of lichenologists in celebration of Hans Trass's 75th birthday. From Left to right: Maarja Nõmm, Lauri Saag, Piret Lõhmus, Andres Saag, Inga Jüriado, Hans Trass, Andi Pärn, Tiina Randlane, Kristjan Zobel, Ave Suija, Leili Järva, Aavo Roosma, Ede Lepik, Mari-Liis Rebane.