SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 2006)

Sitzungsberichte und Abhandlungen der Naturwissenschaftlichen Gesellschaft Isis in Dresden - Gesellschaft Isis in Dresden. (Warnatz & Lehmann, 1886)

A sixth summary of the Verbenaceae, Avicenniaceae, Stilbaceae, Chloanthaceae, Symphoremaceae, Nyctanthaceae, and Eriocaulaceae of the world as to valid taxa, geographic distribution and synonymy - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.N. Moldenke and A.L. Moldenke, 1980)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 1973)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 1986)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 1991)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 2012)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 2015)

Soil and vegetation inventory of Wagner Natural Area, Alberta - Alberta. Alberta Environment. (Geowest Environmental Consultants Ltd, 2000)

The Sonoran Quarterly - Desert Botanical Garden (Ariz.) (Desert Botanical Garden, 1997)

The Sonoran Quarterly - Desert Botanical Garden (Ariz.) (Desert Botanical Garden, 2008)

The Sonoran Quarterly - Desert Botanical Garden (Ariz.) (Desert Botanical Garden, 2014)

South Saskatchewan River Basin riparian health overview, including. Part 1, Red Deer, Bow and South Saskatchewan Rivers and - Alberta. Alberta Environment. (The Society, 2005)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2001)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2002)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2004)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2005)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2006)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2007)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2008)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2009)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2010)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2011)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2013)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2015)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2017)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2018)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2019)

Southwestern rare and endangered plants : proceedings of the second conference : September 11-14, 1995, Flagstaff, Arizona - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (Rocky Mountain Forest and Range Experiment Station, U.S. Dept. of Agriculture, 1996)

Special papers - Ohio Academy of Science. (The Academy, 1909)

Sphenostemonaceae Anacardiaceae - Jonsell, Bengt (1997)

Spixiana. Supplement - Zoologische Staatssammlung München. (Zoologische Staatssammlung München, 1981)

Spixiana. Supplement - Zoologische Staatssammlung München. (Zoologische Staatssammlung München, 1978)

Status of endangered and threatened sand area species of the Illinois flora - Illinois. Natural History Survey Division (Illinois Natural History Survey, 2011)

Status of the Slender Mouse-ear-cress (Halimolobos virgata) in Alberta - Alberta. Fish; Wildlife Division. (Alberta Sustainable Resource Development, 2005)

Status of the Slender Mouse-ear-cress (Halimolobos virgata or Transberingia bursifolia susp. virgata) in Alberta : update 2009 - Alberta. Fish; Wildlife Division. (Alberta Sustainable Resource Development, 2009)

Status review of Arabis fecunda, U.S.D.A. Forest Service, Region 1, Beaverhead National Forest ; prepared by Lisa Ann Schassberger - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1990)

Status review of Arabis fecunda, U.S.D.A. Forest Service, Region 1, Beaverhead National Forest - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1990)

Status review of Clarkia rhomboidea in Montana - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1997)

Status review of Lesquerella carinata and Lesquerella paysonii, U.S.D.A. Forest Service, Region 1, Deerlodge National Forest, Montana - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1991)

Status review of Lesquerella humilis, U.S. Forest Service, Region 1, Bitterroot National Forest, Montana - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1988)

Status review of Lesquerella klausii, U.S. Forest Service, Region 1, Helena and Lewis & Clark National Forests, Montana - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1988)

Status review of Lesquerella klausii, U.S. Forest Service, Region 1, Helena and Lewis & Clark National Forests, Montana - Montana Natural Heritage Program. ([Montana Natural Heritage Program], 1988)

Status review of Lesquerella sp. novum, Butte District, Bureau of Land Management, Montana - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1993)

The Stephen A. Forbes collections at the Illinois Natural History Survey, 1858-1994 : Annual report 1994 - Forbes, Stephen Alfred, 1844 -1930 (Illinois Natural History Survey, 1994)

Streptanthus morrisonii complex : final report - United States. Bureau of Land Management. (Tierra Madre Consultants, 1987)

Structural and systematic botany: being an arrangement of plants, forming a basis for the study of botany, either on the Linnaean or natural systems - Smith, Edward, 1818? -1874 (C. Griffin, 1855)

Studies on Rocky Mountain flora - Rydberg, Per Axel, 1860 -1931 (New York Botanical Garden, 1912)

Study of threatened and endangered plants - United States. Bureau of Land Management. Denver Service Center. (Inter-Mountain Research, Incorporated, 1979)

Stuttgarter Beiträge zur Naturkunde. Serie A, Biologie - Staatliches Museum für Naturkunde in Stuttgart. (Staatliches Museum für Naturkunde, 1982)

Stuttgarter Beiträge zur Naturkunde. Serie A, Biologie - Staatliches Museum für Naturkunde in Stuttgart. (Staatliches Museum für Naturkunde, 1994)

Stuttgarter Beiträge zur Naturkunde. Serie A, Biologie - Staatliches Museum für Naturkunde in Stuttgart. (Staatliches Museum für Naturkunde, 1997)

Sugar beet research - United States. Agricultural Research Service. (U.S.D.A., Agricultural Research Service?], 2005)

Sugar beet research - United States. Agricultural Research Service. (U.S.D.A., Agricultural Research Service?], 2000)

Sugar beet research - United States. Agricultural Research Service. (U.S.D.A., Agricultural Research Service?], 2001)

Sugar beet research - United States. Agricultural Research Service. (U.S.D.A., Agricultural Research Service?], 1991)

Summary of re-identifications - December 1959 through June 1960 : Change No. 1 - United States. Agricultural Research Service. New Crops Research Branch, (New Crops Research Branch, 1960)

Survey of Bannack State Park and vicinity for Montana plant species of special concern - Montana Natural Heritage Program. (Montana Natural Heritage Program, 1995)

A survey of natural areas in Tyrrell County, North Carolina : for The North Carolina Natural Heritage Program, Coastal Natural Area Inventory Project - North Carolina. Coastal Energy Impact Program. (North Carolina Coastal Energy Impact Program, Office of Coastal Management, North Carolina Dept. of Natural Resources and Community Development, 1982)

Survey of rare vascular plants in Fidler-Greywillow Wildland Provincial Park - Alberta. Parks; Protected Areas Division. (Alberta Community Development, Parks and Protected Areas, 2005)

Surveys for significant plant resources and related vegetation types for the Missoula Field Office of the Bureau of Land Management : 2006 survey results - Montana Natural Heritage Program. (Montana Natural Heritage Program, 2007)

Surveys of significant plant resources and related vegetation types for the Butte Office of the Bureau of Land Management - Montana Natural Heritage Program. (Montana Natural Heritage Program, 2005)

Swainsona - Botanic Gardens of Adelaide; State Herbarium. Board. (Board of the Botanic Gardens and State Herbarium, 2019)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1978)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1980)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1981)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1983)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1985)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1989)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1991)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1993)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1995)

Synopsis plantarum vascularium Montis Pollini - Terracciano, Nicola. (Tipografia della R. Accademia dei Lincei, 1890)

Systematics in Agriculture Canada at Ottawa, 1886-1986 - Canada. Agriculture Canada (Biosystematics Research Centre, Agriculture Canada, 1986)

The Tasmanian Naturalist - Tasmanian Field Naturalists' Club (Tasmanian Field Naturalists' Club, 1989)

The Tasmanian Naturalist - Tasmanian Field Naturalists' Club (Tasmanian Field Naturalists' Club, 1993)