Author
New York Botanical Garden
3
American Society of Plant Taxonomists
2
Missouri Botanical Garden
2
Agassiz Association. Sullivant Moss Chapter
1
American Bryological Society
1
Arnold Arboretum
1
Association of Regional Weed Control Conferences
1
Botanický ústav (Československá akademie věd)
1
Botanický ústav AV ČR
1
Bryologische en Lichenologische Werkgroep
1
Ecological Society of America
1
International Association for Plant Taxonomy
1
International Association for Vegetation Science
1
Jardin botanique national de Belgique
1
Jardin botanique national de Belgique/National Botanic Garden of Belgium
1
Koninklijke Nederlandse Natuurhistorische Vereniging. Bryologische Werkgroep
1
Nordisk bryologisk forening
1
Organization for Flora Neotropica
1
Royal Botanic Gardens, Kew
1
Society for Economic Botany (U.S.)
1
Society for In Vitro Biology
1
Sullivant Moss Society
1
Tansley, A. G. (Arthur George), Sir, 1871-1955
1
Tissue Culture Association
1
Torrey Botanical Club
1
Torrey Botanical Society
1
United States. Division of Vegetable Pathology
1
United States. Section of Vegetable Pathology
1
Weed Science Society of America
1
Weed Society of America
1