Physocarpus malvaceus (Greene) Kuntze
Mallow Ninebark, Mallow-leaf Ninebark
Rosaceae (Rose Family)
USDA Symbol: PHMA5
Mallow-leaf Ninebark is a 1 1/2-6 ft., vase-shaped, deciduous shrub with exfoliating bark and foliage resembling small grape or currant leaves. Tiny white flowers occur in loose, rounded clusters. Fall foliage ranges from intense red to subtle rose-brown.
Mallow Ninebark is a member of the rose family (family Rosaceae) which includes herbs, shrubs, and trees with mostly prickly stems.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Leaf Retention: Deciduous
Fruit Type: Aggregate , Follicle
Size Notes: Up to about 6 feet tall.
Fruit: Aggregated follicles.
Bloom InformationBloom Color: White
Bloom Time: May , Jun , Jul
DistributionUSA: CO , ID , MT , NV , OR , UT , WA , WY
Native Distribution: E. of the Cascades from s.c. B.C. to c. OR, e. to s.w. Alt., WY & UT
Native Habitat: Dry canyon bottoms, rocky hillsides & yellow pine/Douglas fir forests
Growing ConditionsWater Use: Low
Light Requirement: Part Shade
Soil Moisture: Dry
CaCO3 Tolerance: High
Soil Description: Drier, rocky soils.
BenefitConspicuous Flowers: yes
Fragrant Flowers: yes
Value to Beneficial InsectsSpecial Value to Native Bees
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
PropagationDescription: Easy to start from semi-hardwood cuttings with or without hormone treatment. Slow to start from fall-sown seed.
Seed Collection: Ripe fruits can be picked from the shrub or shaken onto a drop cloth.
Seed Treatment: Seeds require no special treatment.
Commercially Avail: yes
Find Seed or Plants
Find seed sources for this species at the Native Seed Network.
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Native Seed Network - Corvallis, OR
Web ReferenceWebref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
Additional resourcesUSDA: Find Physocarpus malvaceus in USDA Plants
FNA: Find Physocarpus malvaceus in the Flora of North America (if available)
Google: Search Google for Physocarpus malvaceus
MetadataRecord Modified: 2023-02-23
Research By: TWC Staff