> [!cite] BHL link: this entry starts at [page 195](https://www.biodiversitylibrary.org/page/33265872) of TL-2 Suppl. IV > Author links: [IPNI](https://www.ipni.org/a/1677-1) LSID 1677-1, [Wikidata](https://www.wikidata.org/wiki/Q6109537) QID Q6109537 > Support pages: [[Abbreviations|abbreviations]], [[Layout key|layout key]], [[Cite TL-2|cite TL-2]] ### Author Clausen, Robert Theodore (1911-1981), American botanist, born in New York City, graduated from high school in Passaic, New Jersey 1929, at Cornell University 1929-1981 \[sic\], B.A. 1933, worked with Karl M. Wiegand, M.A. 1934, Dr. phil. 1937 with his "Monograph of the Ophioglossaceae", assistant in botany 1933-1934, research assistant with L.H. Bailey Hortorium 1935-1937, instructor 1937-1939, asst. professor of botany 1939-1944, associate professor 1944, professor 1949, curator of the Wiegand Herbarium 1954-1977 (retirement), continued an "emeritus status", died 31 Dec 1981. **Abbreviated name**: *R.T. Clausen* \[standard form in IPNI: *R.T.Clausen*\] #### Herbarium and types [[Collection BH|BH]] (Crassulaceae), [[Collection CU|CU]], [[Collection MEXU|MEXU]], [[Collection MO|MO]] and [[Collection NY|NY]], [[Collection US|US]]. #### Bibliography and biography Barnhart 1: 354 (b. 26 Dec 1911, N.Y. City); Hortus 3: 1190; IF suppl. 4, p. 318; IH 2: 129; Kew 1: 566; Roon p. 27; Zander ed. 10, p. 645, ed. 11, p. 734. #### Biofile - Bates, D.M., Bull. Torrey bot. Club 109(4): 549-550. 1982, Taxon 31(2): 389. 1982 (brief obit.), Gentes Herbarum 12(3): \[1-7\]. Mai 1984 (detailed obit., list of publ, portr., d. 31 Dec 1981). - Holman, J.H. and A.C. Jermy, An international directory of Pteridologists no. 51. 1973. - Knobloch, I.W., Plant collectors of N. Mexico, Monogr. ser. 17, Michigan State Univ. 1979, p. 8; Prelim. verif. list pl. coll. Mexico, Phytologia Mem. 6: 16. 1983. - Rodgers, A.D., Liberty Hyde Bailey 477-478, 485. 1949. #### Outside our period - (1) *Sedum of the trans-Mexican volcanic belt*, an exposition of taxonomic methods, New York 1959, 390 p. - (2) *Sedum of North-America*, north of the Mexican Plateau, Cornell University Press, Ithaca and London, p. 1-742, 184 ills., ISBN 0-8014-0950-0, published 26 Mar 1976, see Taxon 25(2-3): 348. 1976, see also the review by J.J. Wurdack, Taxon 26(1): 114. 9 Mar 1977. ### Publications ##### n.26.525. Ophioglossaceae of New Jersey **Title** The *Ophioglossaceae of New Jersey*, a study in local distribution... Bulletin Torrey botanical Club... 1937. Oct. **Notes** *Co-author*: James Leyland Edwards (b. 1895). *Publ*.: 3 Mai 1937 (in journal), p. 269-284, *pl. 7.* *Copy*: B. – Reprinted and to be cited from Bull. Torrey bot. Club 64(5): 269-284, *pl. 7.* 1937. ##### n.26.526. monograph of the Ophioglossaceae **Title** A *monograph of the Ophioglossaceae*... Menasha, Wisconsin (George Banta Publishing Company) 1938. Oct. **Abbreviated title**: *Monogr. Ophiogloss.* **Notes** *Publ*.: 1938 (Nat. Nov. Jul (1,2) 1939), cover-t.p., p. \[1\]-177. *Copies*: HH, L, MO, U. – Issued as Mem. Torrey bot. Club 19(2). 1938. *Ref*.: C.A.W., Amer. fern J. 28(3): 116-118. 17 Sep 1938 (rev.). ##### n.26.527. Some plants of New York **Title** *Some plants of New York*... New York 1939. Oct. **Notes** *Publ*.: Jan-Feb 1939 (in journal), p. \[1\]-9. *Copy*: MO. – Reprinted and to be cited from Torreya 39(1): 1-9. 1939.