E-Flora BC: Electronic Atlas of the Flora of British Columbia

Cotoneaster horizontalis Decne.
rock cotoneaster (rockspray cotoneaster)
Rosaceae (Rose family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #9402)

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Distribution of Cotoneaster horizontalis
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Species Information

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Low shrub, less than 0.5 m tall; stems spreading, the branches stiff, straight, on a horizontal plane; twigs brown-woolly.
Alternate, deciduous or semi-evergreen, egg-shaped to nearly circular, 1-1.5 cm long, entire, abruptly pointed at the tip, dark green, shining and mostly smooth above, paler and sparsely hairy below.
Inflorescences of solitary (sometimes paired), axillary, nearly unstalked flowers; corollas pink, the petals 5, erect; calyces hairy, the 5 lobes triangular; ovaries inferior; stamens about 20.
Berry-like pomes (like miniature apples), egg- to globe-shaped, about 0.5 cm long, red; stones (nutlets) usually 3.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Blooming Period:
Fruit/Seed characteristics:
Colour: Red
Present from Summer to Fall
Source:  The USDA

Habitat / Range

Dry to mesic waste places or open forests in the lowland zone; rare garden escape on S Vancouver Island, the Gulf Islands and the lower Fraser Valley; introduced from Asia.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Cotoneaster horizontalis var. wilsonii Havemeyer ex E.H. Wilson

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References