Poison Hemlock 
Prangos ferulacea 
Pseudopanax crassifolius 
Purple sanicle 
Purplestem Angelica 
Rock Samphire 
Rough Chervil 
Rough-fruited Pittosporum 
Sanicle 
Sanicula crassicaulis 
Scandix australis 
Scandix blepharicarpa 
Scandix palaestina 
Scandix stellata 
Scandix verna 
Schefflera heptaphylla 
Scots Lovage 
Sea holly 
Shepherd's-Needle 
Shrubby platysace 
Sickleweed 
Small-headed eryngo 
Smyrniopsis syriaca 
Smyrnium connatum