'''Jacques Denys (Denis) Choisy''' (5 April 1799, Jussy – 26 November 1859, Geneva) was a Swiss Protestant clergyman and botanist.<ref>[https://books.google.com/books?id=PhMjAQAAIAAJ&pg=PA86 Google Books] Meyers Grosses Konversations-Lexikon, Volume 4</ref>

He studied theology, law, humanities and sciences at the ''Académie de Genève''. In 1821 he became ordained as a minister, and during the following year, furthered his education in Paris. During his stay in Paris, he was accepted as a member of the ''Société d'histoire naturelle''. Following his return to Geneva in 1824, he was named chair of rational philosophy at the Academy, a position he maintained until 1847.<ref name=FR>[https://books.google.com/books?id=llZJAAAAcAAJ&pg=PA141 Bulletin de la Société Botanique de France: publication mensuelle ..., Volume 7] by Société Botanique de France</ref>

As a student in Geneva, he came under the influence of Augustin Pyramus de Candolle, and in the process, developed a lifelong passion for botany.<ref name=FR/> He was a principal contributor towards Candolle's publication of "Prodromus Systematis Naturalis Regni Vegetabilis", being the author of the sections involving the plant families Marcgraviaceae, Convolvulaceae, Hydroleaceae, Selaginaceae, Nyctaginaceae, Hypericineae and Guttiferae.<ref>[http://bibdigital.rjb.csic.es/Imagenes/O_BAI_Dict_Bot_2/BAI_Dict_Bot_2_029.pdf Bibdigital.rjb] {{Webarchive|url=https://web.archive.org/web/20140313104940/http://bibdigital.rjb.csic.es/Imagenes/O_BAI_Dict_Bot_2/BAI_Dict_Bot_2_029.pdf |date=2014-03-13 }} biographical information</ref> The botanical genus ''Choisya'' (family Rutaceae) is named in his honor.<ref>[https://books.google.com/books?id=NJ6PyhVuecwC&pg=PA105 The Names of Plants] by D. Gledhill</ref>

As a theologian/philosopher he published works with titles such as, "''Des doctrines exclusives en philosophie rationelle''" (1828) and "''Les lois morales: Fragment d'un cours de philosophie morale''" (1836).<ref>[https://www.google.com/search?tbo=p&tbm=bks&q=inauthor:%22Jacques+Denis+Choisy%22 Google Search] publications</ref>

== Selected botanical works == * ''Prodromus d'une monographie de la famille des hypéricinées'', (9 editions issued from 1821 to 1983) – Prodomus of a monograph on Hypericineae. * ''Descriptions des Hydroléacées'', 1830 – Descriptions of Hydroleaceae. * ''Convolvulaceae orientales'', 1834 – Convolvulaceae Oriental * ''Mémoire sur les familles des Ternstroemiacées et Camelliacées'', 1854 – Treatise on the families Ternstroemiaceae and Camelliaceae.<ref>[http://classify.oclc.org/classify2/ClassifyDemo?search-author-txt=%22Choisy,+Jacques+Denys,+1799-1859.%22 OCLC Classify] published works</ref>

{{Botanist|Choisy|Choisy, Jacques Denys}}

== References == {{reflist}}

== External links == * [http://www.ipni.org/ipni/advPlantNameSearch.do;jsessionid=20EF21844B1290F9D9198BECC5810454?find_infragenus=&find_isAPNIRecord=true&find_geoUnit=&find_includePublicationAuthors=true&find_addedSince=&find_family=&find_genus=&find_sortByFamily=true&find_isGCIRecord=true&find_infrafamily=&find_rankToReturn=all&find_publicationTitle=&find_authorAbbrev=Choisy&find_infraspecies=&find_includeBasionymAuthors=true&find_modifiedSince=&find_isIKRecord=true&find_species=&output_format=normal&chunk_size=100&start_row=200 IPNI] List of taxa described & co-described by Choisy (many entries).

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{{DEFAULTSORT:Choisy, Jacques Denys}} Category:1799 births Category:1859 deaths Category:People from the canton of Geneva Category:Swiss Protestant ministers Category:19th-century Swiss botanists