Scientific: Buddleia marrubifolia
Common: wooly butterfly bush
Family: Loganiaceae
Origin: Southwest Texas into Chihuahua between 1,800' and 3,000' elevation

Hardiness zones
Sunset
12, 13
USDA 8-11

Landscape Use: An accent or background plant. This is a gray accent shrub that contrasts well against other shrubs with deep green foliage. All Buddleia are used as garden plants to attract butterflies. 

Form & Character: Somewhat woody perennial, informal to rank

Growth Habit: Moderately fast, ranging and arching to 5 feet with equal to greater spread.

Foliage/Texture: Small to 1", opposite, grayish green tomentose elliptical-shaped leaves with crenate margins, medium fine texture

Flowers & Fruits: Auxiliary clusters of orange tubular flowers, fruit inconspicuous

Seasonal Color: Flowers in spring and early summer

Temperature: Tolerant to 15oF

Light: Mandatory full sun

Soil: Tolerant

Watering: Infrequent, especially during summer

Pruning: Only occasionally lightly head back to rejuvenate growth rate, prune in fall

Propagation: Cutting

Disease and pests: None

Additional comments: Somewhat uncommon, yet a great shrub for Phoenix landscapes with a xeric or desert theme. People who like formal landscapes will be frustrated by this plant because of it's informal habit of growth. But those with informal tastes will enjoy it's free-spirited presence in the landscape. Buddleia is a large genus of over 100 species worldwide.