jPLANTAE AMERlCANAE. 269 



Radix annua, fibrofa. 



€aulis eredius, fimplex, pedalis, obfolete qua- 

 drangulus, glaber : ramis oppofitis. 



Folia oppofita, ad flores verticillata, ovato- 

 oblonga in petiolos bafi latiufculos conna- 

 tos ciliatos atteniiata, glabra, t-emota. 



Flores fefliles, aggregati, verticillati, albi : 

 verticillis aequalibus. 



Cal. Perianthium monophyllum, tubulatum, 

 aequale, apice quadridentatum : dentihus 

 acutis, poft florefcentiam majoribus, pa- 

 tentibus ; perfiftens. 



Cor. mondpetala, infundibuliformis •, ^ubus 203 

 filiformis, anguftifTimus, calycc dupio lon- 

 gior s limbus campaniilatiis, obfolete te- 

 tragonus, quadripartitus : laciniis ovato - 

 lanceolatis, acutis, bafi eredis, apice pa- 

 tulis. 



St AM. Filament a quatuor, limbo corollae ad 

 bafin incifurarum inferta eaque breviora. 

 Antherae Hibrotundae. 



Pi ST. Germen oblongum, in fundo calycis. 

 Stylus capitatus, fimplex. 



Per. nullum. Calyx tubulatus includit femi- 

 na. 



Sem. bina, oblongo-linearia, hinc convexa, 

 inde plana, glabra, calyce, pauld brevi- 

 ora. 



Adeo- 



