Psidium cattleyanum is known as the strawberry, cattley or cherry guava with sweet/tart fruit that taste like strawberries.

Psidium guajava 'Tropical Pink' is a tasty guava with sweet, pink flesh that tastes of strawberries, pears, and passionfruit.

Psidium guajava 'Tropical White' is a tasty guava with sweet, white flesh that tastes of sweet lime, melon, and passionfruit.

Pteridophyllum racemosum has delicate fern-like foliage and elegant spikes of pendulous white flowers for the shade garden. Looks like a fern but ain't a fern.

Pyrrosia hastata 'Mikasa' sports long, trilobed, felted fronds with cinnamon undersides and sophisticated silvery surfaces.

Pyrrosia lingua 'Eboshi' has intriguing, twisted, leathery fronds with cinnamon-felted undersides.

Pyrrosia lingua 'Futaba Shishi' has Intriguing, forked, leathery fronds with cinnamon-felted undersides.

Pyrrosia lingua 'Hiryu' is a cool, serrated form of this intriguing Asian fern.

Pyrrosia lingua 'Ogon Nishiki' is a rare variegated form with light green and emerald green leathery fronds.

Pyrrosia lingua 'Tachiba Koryu' has heavily rippled, blue-green, leathery fronds.

Quercus 'Pinnatifida' has highly dissected, grey-green foliage up to 10 inches long resembling a Philodendron more than an oak!

Rheum alexandrae is a rare species of rhubarb from the mountains of China and Tibet with heart-shaped leaves and yellow flowers.

Rheum palmatum is an ornamental rhubarb with huge leaves, often flushed with red beneath.

Rheum rhabarbarum 'Glaskin's Perpetual' is a culinary rhubarb with short, tender stalks that are bright red, tender, very sweet and juicy.

Rheum rhabarbarum 'Holsteiner Blut' is a culinary rhubarb known for its great flavour and bright red stalks.

Ornamental rhubarb with large, spade-shaped foliage emerging red-flushed later with green tops and bold red undersides.

Rhipsalis cereuscula is a fascinating, epiphytic cactus with light-green stems that have a striking resemblance to rice grains.

Rhodochiton atrosanguineus 'Purple Bells' is an exotic tender vine with dark purple tubular flowers and light purple calyces.

Rhododendron campanulatum subsp. aeruginosum 'Blue Ox' has foliage emerging powder blue on tight mounds 2 feet tall and wide.