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NameClausen, Robert Theodore
Date of birth1911
Date of death1981
Remarks"b. New York, 26 Dec 1911; d. New York, 31 Dec 1981. Specialist in taxonomic methodology, the genus Sedum. Monographer of the genus Botrychium and the family Ophioglossaceae as Ph.D. thesis. BA (1933), MS (1934), and PhD (1937), all from Cornell University. After various appointments at the L.H.Bailey Hortorium, 1935-1941, joined the Department of Botany as Assistant Professor of Botany, becoming Associate Professor 1944, and Professor in 1949. Also Curator of the Wiegand Herbarium, 1954. His title was changed to Professor of Biology in 1968, and he was awarded emeritus status in 1977. Clausen is probably unique in defining taxa statistically, based on large samples, with each dimensional character presented as means, upper and lower quartiles, and extremes. His achievements in such ground-breaking and painstaking work have never been properly acknowledged, as so often happens with innovators before their time." (vide B. Bates) [author note: Herbarium and types: BH (Crassulaceae), CU, MEXU, MO, NY, US] [collector note: CU (orig.), GH, MEXU, MO, NY (20), US]
ASA Botanist ID100132 botanist
GUIDhttp://purl.oclc.org/net/edu.harvard.huh/guid/uuid/34cc12a7-35e7-4591-8651-a1c222b15a58
Variant nameClausen, Robert Theodore et alia
Variant nameRobert Theodore Clausen
Author nameR. T. Clausen
B & P Author Abbrev.R. T. Clausen
Standard/Label NameR. T. Clausen
Full NameClausen, Robert Theodore
Geography AuthorUnited States of America
Geography CollectorCanada,  Mexico,  United States of America
Specialty AuthorPteridophytes
Specialty AuthorSpermatophytes
Specialty CollectorPhanerogams
Citation as Author Authors of Plant Names. Royal Botanic Gardens, Kew
Citation as AuthorTaxon. Lit., ed. 2 (TL2)/S
Citation as Authorpers. comm. from B. Bates
Citation as CollectorIndex Herbariorum - Collectors A-D
Citation as CollectorPl. Collectors N. Mexico. 1979
Member of teams/groups
Author in Sedum N. Amer.
Author in Variat. Spp. Sedum Mex. Cordill. Plateau
Author in Sedum Trans.-Mex. Volcanic Belt
HoldingsSearch for specimens collected by R. T. Clausen
Collections in[no date] (2),  1932 (1),  1934 (5),  1935 (1),  1936 (1),  1937 (2),  1939 (4),  1940 (9),  1941 (62),  1942 (5),  1943 (14),  1944 (82),  1945 (102),  1946 (16),  1947 (63),  1948 (11),  1949 (98),  1950 (31),  1951 (15),  1952 (71),  1953 (9),  1954 (6),  1955 (1),  1956 (7),  1957 (3),  1958 (3),  1959 (10),  1960 (12),  1961 (20),  1962 (37),  1963 (50),  1964 (30),  1965 (17),  1966 (8),  1968 (2),  1969 (1),  1970 (11),  1971 (2),  1972 (7),  1973 (2),  1976 (1),  1977 (2),  1979 (1),  1980 (2)
Collector Teams:J. L. Edwards W. L. Highton & R. T. Clausen  J. L. Edwards & R. T. Clausen  R. T. Clausen & E. R. Clausen  R. T. Clausen et al.  R. T. Clausen & H. A. Wahl  R. T. Clausen & C. H. Uhl  R. T. Clausen & Wahl  W. L. C. Muenscher & R. T. Clausen  Robert T. Clausen & Harold Trapido  R. T. Clausen & H. Trapido  R. T. Clausen & J. M. Clausen  E. R. Clausen & R. T. Clausen  R. T. Clausen, Harold Trapido & Prof. Stover  R. T. Clausen, E. R. Clausen & F. P. Wadleigh  R. T. Clausen & J. L. Edwards  R. T. Clausen & R. M. Schuster  R. T. Clausen & W. M. Buswell  R. T. Clausen, L. J. Kezer & D. G. Huttleston  R. T. Clausen & L. J. Kezer  R. T. Clausen & F. M. Casey  R. T. Clausen & E. M. Shields  R. T. Clausen, C. H. Uhl & N. W. Uhl  R. T. Clausen, F. Miranda G. & E. I. Hernandez Xolocotzi  R. T. Clausen, J. L. Edwards & L. J. Kezer  R. T. Clausen & E. N. Clausen  R. T. Clausen, L. J. Kezer & E. W. Jameson  R. T. Clausen & C. T. Rogerson  W. C. Wilson & R. T. Clausen  R. T. Clausen & A. L. Andrews  R. T. Clausen & W. A. Hinkey  R. T. Clausen, J. Krusi & J. C. Clausen  R. T. Clausen & R. Cervantes G.  R. T. Clausen & S. J. Smith  R. T. Clausen, K. W. Hunt & W. T. Winne  L. R. Clark, W. C. Wilson & R. T. Clausen 
Author Teams:R. T. Clausen & C. H. Uhl  R. T. Clausen & Wahl