Common name (English)
Reseda phyteuma Corn Mignonette
Retama monosperma Bridal broom
Retama raetam White Broom, White weeping broom
Rhizobium radiobacter
Rhododendron Rhododenron
Ribes rubrum European red currant
Ribes uva-crispa English gooseberry
Ricinus communis Castor bean, Castor
Rosa gallica Apothecary Rose
Rosa noisettiana Noisette Rose
Rosa × damascena Damask rose
Salix babylonica Babylon Weeping Willow
Salvia aethiopis African sage
Salvia officinalis Common Sage
Sambucus ebulus Danewort
Sapindus mukorossi Chinese soapberry, North Indian Soapnut
Sapium stylare
Saponaria officinalis bouncing bet
Saponaria sicula
Schinus molle American pepper, California peppertree