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Holodiscus dumosus (Rockspirea)
Bransford, W.D. and Dolphia

Holodiscus dumosus

Holodiscus dumosus (Nutt. ex Hook.) A. Heller

Rockspirea, Glandular Oceanspray, Bush Rockspirea, Cream Bush

Rosaceae (Rose Family)

Synonym(s): Holodiscus discolor var. dumosus, Holodiscus dumosus var. typicus


USDA Native Status: L48 (N)

Glandular oceanspray or bush rockspirea is a low, intricately branched, spreading shrub, usually 1-7 ft. tall, with reddish twigs; aromatic, deciduous foliage; and feathery panicles of small, pinkish-white flowers.

Grows in lava, pumice, and volcanic ash soils.


From the Image Gallery

2 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Shrub
Leaf Retention: Deciduous
Fruit Type: Achene , Aggregate
Size Notes: Up to about 10 feet tall, often shorter.
Leaf: Dark Green
Fruit: Aggregated achenes.

Bloom Information

Bloom Color: White , Pink
Bloom Time: Jun , Jul , Aug , Sep
Bloom Notes: White, sometimes pinkish.


USA: AZ , CO , ID , NM , NV , TX , UT , WY
Native Distribution: W. TX & adjacent Mex. to AZ & s.e. CA, n. to n.w. WY, c. ID & n.c. OR
Native Habitat: Dry, rocky cliffs & hillsides

Growing Conditions

Water Use: Low
Light Requirement: Part Shade
Soil Moisture: Dry
CaCO3 Tolerance: High
Soil Description: Dry, rocky soils.
Conditions Comments: Grows in lava, pumice & volcanic ash soils.


Use Wildlife: A good wildlife browse plant.
Conspicuous Flowers: yes


Description: Semi-hardwood cuttings, suckers and seeds may be used.
Seed Collection: Seeds are produced in tiny, dry capsules.
Seed Treatment: The tiny seeds require cold stratification at 41 degrees for up to 18 weeks.
Commercially Avail: yes

Web Reference

Webref 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 resources

USDA: Find Holodiscus dumosus in USDA Plants
FNA: Find Holodiscus dumosus in the Flora of North America (if available)
Google: Search Google for Holodiscus dumosus


Record Modified: 2022-10-18
Research By: TWC Staff

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