Macleaya cordata (Plume Poppy)

Large, bluish, finely sculptured leaves. Buff-colored flowers. A bold, impressive, eye-catching plant. 8-12 ft. Zone 7

Melianthus major 'Honeybush' (Honeybush)  
Peanut-butter scented bluish foliage and bronze-red honey-scented flower spikes can reach 7 ft.

Zone 8. Sun.    

Metasequoia glyptostroboides (Dawn Redwood)
Soft, bright green foliage turns a cinnamon color in Fall. A deciduous conifer. Nice for container or specimen in a garden. Sun. Zone 7

Milium effusum aureum (Bowles' Golden Grass)
Evergreen, golden-yellow foliage  up to 12". Yellow flowers great for arrangements. Sun. Zone 7

Mitchella repens (Partridgeberry)
White flowers in Summer, then red berries follow,

on creeping evergreen foliage to 2 inches.

Partial shade. Zone 4-9 

Monarda didyma 'Raspberry Wine' (Bee Balm)

Large dark pink, fragrant flowers to 3 ft.

Attractive to bees and birds. Sun Zone 7 

Muehlenbeckia complexa (Wire Vine)
Evergreen-ish, delicate climber or ground cover to 30 ft. Needs support or will sprawl. Nice screen or backdrop. Sun. Zone 7

Mukdenia rossii 'Crimson Fans' (Crimson Fans Tickfoil)
Mostly evergreen ground cover with beautiful red Fall color. Tiny white flowers in Spring. 12 inch spread. Zones 4-9. Sun or partial shade             

Musa 'Dwarf Orinoco' (Red Venezuelan Banana)

A dramatic addition to containers or borders with large foliage, which can be used in cooking. 5-8 ft. Best in Sun. Zones 7b-10  

Musella lasiocarpa (Hardy Chinese Banana)

Yellow flowers are a honey bee magnet! Large green foliage. Plant grows to 5 ft. Zone 8.  Sun.   

Myrica gale    (Sweet Gale)   

Small shrub with attractive gray-green aromatic foliage. Roots fix nitrogen.

Fruit attracts birds.    2-6 ft.Boggy-wet soils. Best in Sun.    NATIVE