Polystichum acrostichoides

Polystichum bicknellii

Polystichum makinoi

Polystichum munitum

Polystichum polyblepharum

Polystichum rigens

Polystichum tsus-simense

Poncirus trifoliata 'Flying Dragon'

Primula auricula

Primula denticulata 'Cashmeriana'

Primula marginata

Prostanthera cuneata

Pseudowintera colorata

Quercus cerris

Quercus infectoria

Quercus libani 'Karaman'

Quercus pubescens

Rhododendron groenlandicum

Rhododendron hanceanum

Ribes laurifolium

Ribes magellanicum

Rodgersia podophylla

Rohdea japonica

Rubus cockburnianus

Ruscus aculeatus

Ruta graveolens

Sabal minor

Salvia uliginosa

Sapindus mukorossi

Sarcococca hookeriana var. humilis

Sarcococca orientalis

Sarcococca ×confusa

Scabiosa columbaria

Schefflera taiwaniana

Sedum telephium 'Purpursonne'

Sibbaldiopsis tridentata (Potentilla tridentata)