Etienne-Pierre Ventenat (1757 - 1808) and the gardens of Cels and Empress Joséphine Author Callmander, Martin W. Conservatoire et Jardin botaniques de la Ville de Genève, C. P. 60, 1292 Chambésy, Switzerland. Author Durbin, Olivier D. Conservatoire et Jardin botaniques de la Ville de Genève, C. P. 60, 1292 Chambésy, Switzerland. Author Lack, Hans-Walter Conservatoire et Jardin botaniques de la Ville de Genève, C. P. 60, 1292 Chambésy, Switzerland. Author Bungener, Patrick Conservatoire et Jardin botaniques de la Ville de Genève, C. P. 60, 1292 Chambésy, Switzerland. Author Martin, Pascal Conservatoire et Jardin botaniques de la Ville de Genève, C. P. 60, 1292 Chambésy, Switzerland. Author Gautier, Laurent Conservatoire et Jardin botaniques de la Ville de Genève, C. P. 60, 1292 Chambésy, Switzerland. text Candollea 2017 2017-03-30 72 1 87 132 journal article 20462 10.15553/c2017v721a8 acfdbf0a-a444-4a6d-a27f-2fbb27a6893b 2235-3658 5721919 83. Tradescantia rosea Vent., Descr. Pl. Nouv. : tab. 24. 1801. Ξ Callisia rosea (Vent.) D.R. Hunt Typus: UNITED STATES : “Caroline et Floride” , Michaux s.n. ( holo- : G [ G00341445 ]!; iso- : P [ P02173797 ]!, P-MICH [ P00667162 ]!). Notes. – A single collection has been located in Ventenat’s herbarium. This collection is wrongly labelled “Beauvois” standing for Ambroise Marie François Joseph Palisot de Beauvois (1752-1820). However, Ventenat in Descriptions (1801: tab. 24) referred to material collected by Michaux “dans la Basse-Caroline et dans la Géorgie ” that was cultivated in Cels’s garden. Two duplicates of the specimen collected in the wild have been found in Paris in P and in P-MICH respectively. Cultivated material kept in MPU (Herb. Thibaud) and P (Herb. Bonpland) labelled as “Hort. Cels” and “Hort. Malmaison” respectively have probably been collected after the validation of the name T. rosea in 1801 and should therefore not be considered as original material.