sula bivalvis. Herbœ aut rarht$ suffrutices; flores 

 terminales, spicati aut paniculati Capsula acan- 

 thi more dehiscens in N. ureiite inde forsan non 

 congeneri. » 



Lcbmanii (1) a donné les caractères naturels du 

 genre JSicotiana ainsi qu'il suit : 



Calyx. Perianthuni monophylhim, ovalum vel 

 oblongum, vel subglobosum, in duabus speciebus 

 sulibiiabiatum, quinquelidum persistens : laciniis 

 erectis, lanceolatis, in nonnuUis ovatis, in plnrimis 

 inaîqualibus. 



Corolla monopetala, infundibuliformis, vel bypo- 

 crateriformis, in una specie snbringens. Tubas in- 

 certa longitudine calycem excedens, inferne cylin- 

 dricus, superne versus faucem s;çpe ampliatus vel 

 inflato-ventricosus. Linibus erecto-palens, vel patu- 

 lus, vel patentissimus , semiquinquefidus, quinque- 

 plicaïus : laciniis vel oblongis, vel ovatis, vel subro- 

 tnndis , in nonnullis subina?qualibus , oblusis aut 

 acutis. 



Staminn. Filamenta quinque, subulata, fundo 

 corollœ adnata, tubi fere longitudine, adscendentia. 

 in pluribus versus basin pilosa, vel villosa. Antherae 

 o])long[c vel subrotunda^ biloculares, latere dehis- 

 cens centro inserta-. 



Pisiillum. Ovariuni supernni ovalum vel ovato- 

 conicum. Stylus filiforniis, longitudine staminuni. 

 Stigma capitatum , crassum, subbilobum vel sulca 

 Iransversali exarata notatum. 



Pericarpium. Capsula ovata, vel ovato-conica, vel 

 globosa, calyci persistent! . involuta, aut calyce lon^ 

 gior, coriacea, glabra, spadiceo colore, striis qua- 



(1) Gencrh Mcofiananim /lis/nria, 1818. (Hamburgi.; 



