Rhodoendron sinogrande has the largest leaves of any rhododendron which can be three feet long and one foot wide.

Rhododendron 'Boule de Neige" midseason flowers are pure white.

Rhododendron 'Cody' has frilly-edged pink flowers, pale yellow overlaid with moderate purplish pink at edges.

Rhododendron 'Nancy Evans' has orange-red buds open to yellow hose-in-hose blossoms in mid-season.

Rhododendron 'Neon' has a vivid orangey-peach with a yellow throat, dark leaves, and compact growing to boot!

Rhododendron 'Percy Wiseman' has rare peach-colored blossoms that appear in midseason.

Rhododendron 'Polarnacht' has frilly deep dark purple blooms with spotted red throats are held in trusses of 12-14.

Rhododendron 'Purple Passion' has regal, deep reddish purple blooms highlighted with white and delicate maroon spots.

Romneya coulteri or Matilija poppy has incredible, crepe-paper thin, pure white petals with large yellow centres atop bluish foliage!

Roscoea alpina is a cool ginger relative with orchid-like light purple flowers.

Roscoea ‘Brown Peacock' has orchid-like, lavender flowers on top of purple-brown stalks with clasping green leaves that are red-flushed beneath.

Roscoea purpurea 'Cinnamon Stick' has blood red stems that ascend to bronzed leaves and large, orchid-like lavender flowers.

Roscoea ‘Spice Island' has lavender purple, orchid-like flowers on top of deep red stalks.

Rudbeckia occidentalis 'Green Wizard' is for esoteric gardeners who like odd plants, especially those without petals!

Salix magnifica is a beautiful and interesting large shrub or small tree with broad, bluish-green leaves.

Silver sage (Salvia argentea) is a clump-forming biennial or short-lived perennial that is so worth it for the large, wooly, silver foliage.

Salvia 'Blue Lips' has aromatic, crinkly, dark green leaves topped with spikes festooned with two-lipped, open-mouthed, tubular, soft yellow flowers with purple-blue lips.

Caucasus sage (Salvia daghastanica) is an unusual and rare mat-forming, prostrate perennial with velvety, silver leaves and lavender-purple flowers.

Salvia darcyi Vermillion Bluffs is an extra hardy version with large clumps topped in spikes of bright orange-red flowers.