Massonia roggeveldensis has small leaves at first flushed with burgundy turning green and white flowers turning pink.

Massonia saniensis is a dwarf species with cute, grey-green, pustulated leaves and white flowers.

Massonia sempervirens is a botanical mystery with variably pustulated leaves and white fragrant flowers with pink filaments.

Massonia setulosa has rich green, smooth leaves and white flowers that can age to pink with yellow or black anthers.

Massonia sp. Outeniqua is a beautiful plant with blue-green leaves and dramatic pixelated burgundy spots.

Massonia thunbergiana has green to blue-green leaves with variable hairs and pustulations. Possibly hardy to zone 8.

Massonia visserae has small, bluish green, triangular, variably pustulated, hairy leaves with white flowers with black anthers.

The Balang blue poppy, Meconopsis balangensis, is an extremely rare relative of the legendary Himalayan blue poppy.

The legendary Himalayan blue poppy, Meconopsis betonicifolia, is one of the best for the garden.

The legendary Himalayan blue poppy, Meconopsis betonicifolia, is one of the best for the garden. This is the special white form.

'Hensol Violet' is the rare lavender purple version of the Himalayan blue poppy, Meconopsis betonicifolia.

Meconopsis paniculata blooms on stems 4-5 feet tall covered in about 50 cupped, silky-textured, lemon yellow flowers.

The Himalayan blue poppy is a horticultural holy grail. Meconopsis 'Lingholm' is one of the best blue poppies for the garden.

Medeola virginiana is an oddball eastern North American native that will be loved by anyone who appreciates Paris and Trillium.

Medinilla 'Gregori Hambali' is an intriguing tropical plant from southeast Asia with large pleated leaves with beautiful reddish pink undersides.

Melianthus major has cool blue foliage that smells like peanut butter! You know you want it now!

Melittis 'Royal Velvet Distinction' has curious, orchid-like, white flowers with fuchsia lips held over fuzzy foliage. None of your garden friends will have it!

Medlar (Mespilus germanica) 'Breda Giant' offers abundant crops of large, sweet, flavourful fruit with a pleasing texture.

Medlar (Mespilus germanica) 'OSU 9-20' offers prolific crops of sweet, chocolate-brown fruit with a hint of tartness.

Michelia (Magnolia) doltsopa 'Fairy White' is a compact evergreen magnolia with fragrant white flowers from early to late spring.

Mitraria coccinea has firey orange flowers and evergreen foliage on red stems perfect for the shadier parts of the garden.

Monarda fistulosa has pink to lavender flowers popular with bees, hummingbirds, and butterflies and aromatic foliage.

Monarda punctata is a rare and unusual beebalm with pink-flushed bracts and red speckled yellow flowers.

Monardella macrantha 'Marian Sampson' is a unique ground cover with clusters of long, tubular, flaming red flowers popular with hummingbirds.