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 22. Dalea purpurea Vent., Descr. Pl. Nouv. : tab. 40. 1801. Lectotypus (designated here): UNITED STATES . Illinois : Michaux s.n. ( G [ G00341562 ]!; isolecto-: P [ P 02141637 , P 02141638 ]!, P-MICH [ P00667210 in part]!). Notes . – In the Ventenat herbarium, two specimens have been found. One is clearly the one sent by Michaux from Illinois and the second is a sterile collection cultivated in Cels’s garden [G00341561]. We choose to designate as the lectotype the Michaux s.n. collection as it is fertile and better represents the morphology of Dalea purpurea . Michaux collections determined as Petalostemon violaceus Michx. and kept in P and P-MICH are considered as isolectotypes as they do represent the same collection that Ventenat received from Illinois which would be described by him as Dalea purpurea . In P-MICH [P00667210] only the collections on the far left and far right are type material.