Niebla and Vermilacinia (Ramalinaceae) from California and Baja Californiaby Richard W. SpjutReview by: Harrie Sipman · Willdenowia · 1997

Golden Jubilee Part 3 || Katalog der Flechten und flechtenbewohnenden Pilze Deutschlandsby Peter ScholzReview by: Harrie Sipman · Taxon · 2001

Die Flechten Niedersachsens. Bestand, Ökologie, Gefährdung und Naturschutzby Markus HauckReview by: Harrie Sipman · Willdenowia · 1997

Flora of the Guianas, Series C: Bryophytes, Musci III. Leucomiaceae, Thuidiaceae, Sematophyllaceae, Hypnaceaeby A. R. A. Görts-van RijnReview by: Harrie Sipman · Willdenowia · 1997

Golden Jubilee Part 1 || The Lichens and Lichenicolous Fungi of Belgium and Luxembourg: An Annotated Checklistby Paul Diederich; Emmanuël Sérusiaux; Pieter P. G. van den Boom; A. Maarten BrandReview by: Harrie Sipman · Taxon · 2000

Diatoms from JordanJohannes Gerloff, Rashad M. Natour and Patricio Rivera · Willdenowia · 1978

New Chromosome Numbers in AraceaeGitte Petersen · Willdenowia · 1993

Das Herbar C. KochH. Walter Lack · Willdenowia · 1978

A Revision of Opiliaceae II. Opilia Roxb.Paul Hiepko · Willdenowia · 1982

The Genus Brittenia (Melastomataceae)Carlo Hansen · Willdenowia · 1985

A Note on the Genus Matucana (Cactaceae)Rob Bregman · Willdenowia · 1988

Med-Checklist Notulae, 13Werner Greuter and Thomas Raus · Willdenowia · 1986

Johannes Mildbraed 1879 - 1954Fritz Mattick · Willdenowia · 1959