Om Nerikes lafvegetation

by Hellbom, Per J.
Published 1871

Norrlands lafvar

by Hellbom, Per J.
Published 1884

Lafvegetationen på öarne vid Sveriges vestkust

by Hellbom, Per J.
Published 1887

Bornholms lafflora

by Hellbom, Per J.
Published 1890

Lichenaea Neo-Zeelandica seu Lichenes Novae Zeelandiae a Sv / Berggren annis 1874-75 collecti, additis ceteris speciebus indidem huc usque cognitis, breviter commemoratis

by Hellbom, Per J.
Published 1896