Verbatim text: Sleumer, H. 1980b. Xylosma. In: Organization for Flora Neotropica. 1968+. Flora Neotropica. 98+ nos. New York. No. 22, pp. 128–182. Author:
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schreberi requires investigation. Sleumer indicated that anthers in pin flowers lack pollen; however, P. B. Tomlinson (1980) stated that the heterostylous
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Gard. Edinburgh 44: 1–23. Sleumer, H. 1980. A system of the genus Rhododendron L. In: J. L. Luteyn and M. E. O’Brien, eds. 1980. Contributions toward a Classification
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Plants of Western Mexico. 8+ vols. Ann Arbor. Vol. 3, pp. 328–334. Sleumer, H. 1980b. Xylosma. In: Organization for Flora Neotropica. 1968+. Flora Neotropica
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M Mansfeld1935a S Sleumer1959a S cont. Sleumer1967a Sleumer1980a S cont. Sleumer1980b
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Verbatim text: Sleumer, H. 1980. A system of the genus Rhododendron L. In: J. L. Luteyn and M. E. O’Brien, eds. 1980. Contributions toward a Classification
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