> [!cite] BHL link: this entry starts at [page 40](https://www.biodiversitylibrary.org/page/33265237) of TL-2 Suppl. II > Author links: [IPNI](https://www.ipni.org/a/34352-1) LSID 34352-1, [Wikidata](https://www.wikidata.org/wiki/Q36699778) QID Q36699778 > Support pages: [[Abbreviations|abbreviations]], [[Layout key|layout key]], [[Cite TL-2|cite TL-2]] ### Author Beekman, Willem Lubbertus (1895-x), Dutch botanist, born in Sappemeer nr. Groningen; studied at the University of Groningen, Dr. phil. ib. 12 Jan 1924. **Abbreviated name**: *Beekman* \[standard form in IPNI: *Beekman*\] #### Herbarium and types Unknown. #### Bibliography and biography Barnhart 1: 152 (b. 10 Sep 1895). ### Publications ##### n.20.689. Ueber die Torsion des Stengels von Psilotum Bernhardi **Title** *Ueber die Torsion des Stengels von Psilotum Bernhardi*. Beiträge zur Kenntnis der autonomen Bewegungen. Proefschrift ter verkrijging van den graad van doctor in de wis- en natuurkunde aan de Rijksuniversiteit te Groningen,... in het openbaar te verdedigen op Zaterdag 12 Januari 1924, des namiddags te 4 ure... Amsterdam (Drukkerij en Uitgeverij J.H. de Bussy) 1924. Oct. **Abbreviated title**: *Torsion Steng. Psilotum Bernh.* **Notes** *Publ*.: 12 Jan 1924 (date of defense thesis), cover-t.p., p. \[i, iii, v, vii\], \[1\]-108, \[109-110\], theses on loose leaflet p. \[1-3\], *1 pl*. (uncol.). *Copy*: L. − Later published in Receuil trav. bot. néerl. 21: 1-110, *1 pl*. 1924.