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Holodiscus dumosus

Holodiscus dumosus

Holodiscus dumosus
Holodiscus dumosus. Synonym: Holodiscus discolor. (Mountain Spray)
Rosaceae (Rose Family)

Montane, subalpine. Rocky sites, cliff faces. Summer.
Above and left: Lands End, Grand Mesa, July 13, 2017.

Holodiscus dumosus grows to six feet wide and tall with a super abundance of tiny white-to-pink flowers. The plant's preferred habitat is scenic cliff faces with fantastic views. The plants in the photographs on this page hang off ledges 5,000 feet above the Grand Valley.

The genus was named by Carl Johann Maximowicz in 1879. Thomas Nuttall named this species Spirea dumosa in 1847 from a collection he made near the Platte River in 1834. Amos Heller placed the species in the Holodiscus genus in 1898.

"Holodiscus" is Greek for "entire disk", describing the flower. "Dumosus" is Latin for "a bramble" + "abundant", i.e., "very bushy".

Holodiscus dumosus

Holodiscus dumosus. Synonym: Holodiscus discolor. (Mountain Spray)
Rosaceae (Rose Family)

Montane, subalpine. Rocky sites, cliff faces. Summer.
Lands End, Grand Mesa, July 13, 2017.

Flower petals are only about 2 mm long; sepals are about 1.5 mm long. Petals and sepals are white, cream, or somewhat pink. Hairs abound.

Holodiscus dumosus

Holodiscus dumosus. Synonym: Holodiscus discolor. (Mountain Spray)
Rosaceae (Rose Family)

Montane, subalpine. Rocky sites, cliff faces. Summer.
Lands End, Grand Mesa, July 13, 2017.

New growth is flexible and tan/pink becoming woody and gray and sometimes weakly spinescent.

Leaves are quite reminiscent of those of Cercocarpus montanus. Leaf hairiness varies from nearly glabrous to pilose and glandular.

Range map © John Kartesz,
Floristic Synthesis of North America

State Color Key

Species present in state and native
Species present in state and exotic
Species not present in state

County Color Key

Species present and not rare
Species present and rare
Species extirpated (historic)
Species extinct
Species noxious
Species exotic and present
Native species, but adventive in state
Eradicated
Questionable presence

Holodiscus dumosus

Range map for Holodiscus dumosus