PLANTAE AMERXCANAE. 2% 

 Radix annua, fibrofa. 



Caulis ere&us, fimplex, pedalis, obfoiete qua- 

 drangulus, glaber : ramis oppofkis. 



Folia oppofita, ad flores verticillata, ovato- 

 oblonga in petioles bafi latiufculos conna* 

 tos ciliatos attenuata, glabra, remota. 



Flores feffiles, aggregati, verticillati, albi : 

 verticillis aequalibus. 



Cal. Periantkium monophyllum, tubulatum, 

 aequale, apice quadridentatum : dentibus 

 acutis, poft rlorefcentiam majoribus, pa- 

 tentibus ; perfiflens. 



Cor. monopetala, infundibuliformis ; *fubus 20 3 

 filiformis* angufliffimus, calyce duplo lon- 

 gior ; limbus campariulatus, obfoiete te- 

 tragonus, quadripartitus : hciniis ovato - 

 lanceolatis, acutis, bafi eredtis, apice pa~ 

 tulis. 



St am. Filament a quatuor, limbo corollae a<3 



bafin incifurarum inferta eaque breviora, 



Antherae fubrotundae. 

 Pist. Germen oblongum* in fundo calycis. 



Stylus capitatus, fimplex. 

 Per. nullum. Calyx tubulatus mdudit femi- 



na. 



Sem. bina, oblongo-linearia, hi-nc convex^, 

 inde plana, glabra, calyce, paulo brevi- 

 ers. 



Adeo- 



