“¿Antonio Alzate.” . "148 
v 
Pluchea, Cass. 
Polymia, L. 
Podachenium, Benth. 
Polypteris, Nuts. 
Porophyllum, Vaill. 
Psathyrotes;, Gray. 
Psilactis, Gray. 
Pterocaulon, Ell. 
Pyrrhopappus, DC. 
Rafinesquia, Nutt. 
Riddellia, Nutt. 
Rudbeckia, L, 
Rumfordia, DC. 
Sabazia, Cass. 
Salmea, DC. 
Sanvitalia, Lam. 
Sartvvellia, Gray. 
Schaetzelia, Sch. Bip. 
Selerocarpus, Jacq. 
Sehkuhria, Roth. 
Schistocarpha, Less. 
Selloa, HBK. 
Senecio, Tourn. 
Siegesbeckia, L. 
Solidago, L. 
Soliva, Ruiz y Pav. 
Sonchus, Tourn. 
Spilanthes, Jacq. 
Stachycephalum, Sch. Bip. 
Stephanomeria, Nutt. 
Stevia, Cav. 
Stylocline, Nutt. 
Syncephalanthus, Bartl. 
- Synedrella, Gaert. 
- Syn-sartvvellia 
- Syn-schaetzelia 
_ Syn-sclerocarpa 
Syn-pluchea (D. G.) 
Syn-polymia 
Syn-podacheenia 
Syn-polypterida 
Syn-porophylla 
Syn-psathyrotea 
Syn-psilactida 
Syn-pterocaula 
Syn-pyrrhopappa ,, 
Syn-rafinesquia 
Syn-riddellia 
Syn-rudbeckia 
Syn-rumfordia 
Syn-sabazia 
Syn-salmea 
Syn-savitalia 
Syn-schkuhria 
Syn-schistocarpha 
Syn-selloa 
Syn-senecioa 
Syu-siegesbeckia 
Syn-solidagoa 
Syn-soliva 
Syn-soncha 
Syn-spilanthea 
Syn-stachycephala 
Syn-stephanomeria 
Syn-stevia 
Syn-styloclinea $ 
Syn-syncephalantha,, 
Syn-synedrella, 
»” 
