> [!cite] BHL link: this entry starts at [page 868](https://www.biodiversitylibrary.org/page/33120999) of TL-2 Vol. I > Author links: [IPNI](https://www.ipni.org/a/2866-1) LSID 2866-1, [Wikidata](https://www.wikidata.org/wiki/Q117688) QID Q117688 > Support pages: [[Abbreviations|abbreviations]], [[Layout key|layout key]], [[Cite TL-2|cite TL-2]] > [!example] See also [[Franc van Berkhey (or Berkhij), Jan le (Suppl.)|second entry]] for this author ### Author Franc van Berkhey, Jan (Johannes) le (1729-1812), Dutch poet, biologist, political activist, praelector historiae naturalis at Leiden. **Abbreviated name**: *Franc v. Berkhey* \[standard form in IPNI: *Franc*\] #### Herbarium and types Unknown. #### Bibliography and biography Aa 6: 194; Barnhart 1: 171; BM 1: 144; Bossert p. 35; JW 1: 439, 2: 190, 3: 350-351, 5: 239; Kew 1: 225; NNBW 4: 614-615; PR 691. - Anon.. Alg. Konst. Letterbode 1812(1): 179, 299-302, 306-313. - Loosjes, De geest der geschriften van Jan le Francq van Berkhey, Haarlem 1813. Oct., viii, 151 p. *Copy*: U. - Anon., Alg. Konst. Letterbode 1858: 275 (commen. medal). - Wittrock, Acta Horti Berg. 3(3): 167. 1905. - Klaauw, v. d., Het hooger onderwijs in de zoologie te Leiden 1926, p. 4-5, 52-53, 125. - Visser, Janus 62: 135-136. 1975. #### Note The son of Evert le Franc and Maria Berkhey who added his mother's name to his own. For this reason to be alphabetized under le Franc. #### Eponymy *Berkheya* F. Ehrhart (1788, *nom. cons.*); *Berkheyopsis* O. Hoffmann (1893). ### Publications ##### n.1840. Expositio characteristica structurae florum **Title** *Expositio characteristica structurae florum* qui dicuntur *Compositi*. Quam cum figuris, ad naturam expressis annuente summo numine ex auctoritate magnifici rectoris Joannis Jacobi Schultens... nec non amplissimi Senatus academici consensu, & nobilissime facultatis medicae decreto, pro gradu doctoratus, summisque in medicina honoribus et privilegiis rite ac legitimè consequendis, eruditorum examini submittit ad diem 12. Decembris mdcclx H. L. Q. S. Joannes le Francq van Berkhey, Lugduno-Batavus. Leiden (Petrus van der Eyk) 1760. Qu. **Abbreviated title**: *Expos, char. fl. compos.* **Notes** *Edition as thesis*: 12 Dec 1760, date on which the thesis was defended. The above title appears on the issue as a thesis, Leiden 1760, p. \[i-xx\], \[1\]-151, \[152, index\], \[2 p. emend., instr. bind.\], \[4 p. theses\], *pl. 1A, 1B, 2-7*, copper engravings of drawings by the author. *Copies*: BR, NY, U. *Trade edition*: Leiden (Petrus van der Eyk) 1761, Qu., "Expositio... Compositi cum figuris ad naturam expressis auctore Joannes le Francq van Berkhey, M.D., " p. \[i-xx\], 1-151, \[152, index\], \[2 p. err., instr. binder\], *pl. 1A, 1B, 2-8* \[pl. 8 not in thesis!\]. *Copy*: MICH. BM mentions a trade edition, Antwerpen 1760, which we have not been able to find. *Ref*.: BM 1: 144; Kew 1: 225; Plesch p. 140; PR 691. - Sotheby, Cat. Stiftung Bot. 1: 44. 1975 (trade ed., sold at *£* 55).