Opuntia polyacantha 'Imnaha Blue' has nearly spineless, grey-blue pads and soft yellow flowers.

Opuntia polyacantha 'Imnaha Sunset' has round to oval pads with dense, orange spines and yellow flowers with orange centres.

Opuntia polyacantha 'Wasatch Red' is a beautiful reddish-pink flowered form from Wasatch County, Utah at 6000 feet.

Opuntia santa-rita 'Tubac' is a tender Prickly Pear with yellow flowers followed by purple fruit and blue-grey pads that turn purple in winter.

Opuntia sp. (John B.) has mid green new pads becoming bluish with long cinnamon spines & yellow flowers with red centres.

Opuntia utahensis is known as the grizzlybear prickly pear perahps thanks to its copious, long white spines.

Opuntia x columbiana 'Golden Globe' is a prickly pear cactus with yellow flowers and shaggy upright pads.

Opuntia x rutila has 3 inch long pads turning purplish in winter with fiery orange spines & mid pink flowers.

Opuntia 'Baby Rita' is stunning with blue-green, purple-flushed pads and multi-coloured flowers.

Opuntia 'Cyclops'has rounded pads with few spines & only brown glochids like polka-dots with cheerful yellow flowers.

Opuntia 'Dark Knight' has striking pads in shades of purple and green that can become all purple in cold weather.

Opuntia 'Peach Chiffon' produces marvelous peachy pink flowers with slightly darker centres.

Opuntia 'Red Gem' has small, round, 2-3 inch wide pads with short spines and deep pink to magenta flowers.

Origanum 'Gilt Trip' is an ornamental oregano with lilac flowers, mauve calyxes and aromatic, chartreuse-yellow foliage.

Origanum 'Kirigami' forms mounds of aromatic, light green foliage and purple, pink, and green, hops-like inflorescences.

Origanum 'Drops of Jupiter' is an ornamental oregano with pink flowers and aromatic, chartreuse-yellow foliage.

Ornithogalum saundersiae is a South African bulb with clusters of fragrant, upward facing, white flowers on long stems.

Osteospermum 'Purple Mountain' is a super hardy African Daisy with warm lavender purple daisies with yellow centres for months on end.

Osteospermum 'Avalanche' is a super hardy African daisy that blooms from spring until fall with masses of large, dazzling white daisies.

Othonna capensis or little pickles is an extremely hardy ground-covering succulent with blue-green leaves and yellow daisy flowers.

Oxalis oregana 'Klamath Ruby' is a special redwood sorrel with darker green leaves with wine red undersides.

Packera is a daisy relative that forms a great groundcover for sun or shade with cheerful yellow flowers.

Packera obovata is a daisy relative that forms a great ground cover for sun or shade with cheerful yellow flowers.

Paeonia emodi 'Late Windflower' is a lovely species peony with smallish single pure white flowers with yellow centres.

Paeonia lactiflora 'Alertie is a lovely, fragrant, early-blooming, double peony with pale pink flowers that fade to white.