SafePlants

Amelasorbus jackii

Amelasorbus jackii is a deciduous shrub, also known as Jack's Amelasorbus. It is a hybrid between Sorbus (Mountain Ash) and Amelanchier (Serviceberry, Juneberry).

Considerations for Pets

• This shrub can grow to a height of up to 9 feet.
• Leaves are typically 1 1/4 to 2 1/4 inches long.
• The text describes the plant as having winter buds coated with silvery hairs that soon become smooth.

Taxonomy and Nomenclature

• Scientific Name: Amelasorbus jackii Rehder
• Common Name: Jack's Amelasorbus
• Family: Rosaceae (Rose family)
• Major Group: Angiosperms
• Synonyms: Amelasorbus x raciborskiana, X Amelasorbus jackii

Distribution and Habitat

• Amelasorbus jackii is found in the Pacific Northwest, with specimens recorded in Idaho and Oregon.
• It is also known to grow in the Arnold Arboretum.
• Natural populations of *Amelasorbus* (Amelanchier x Sorbus) are known from western North America.

Morphological Characteristics

• It is a deciduous shrub growing to a height of 2 meters (6ft 7in), and sometimes up to 9ft.
• Leaves are dark green, glossy, and downy at first. Some leaves are entire, while others show influence of Sorbus.
• The winter buds are initially coated with silvery hairs but soon become smooth (glabrous).

Hardiness

• Hardy to zone (UK) 3 and is not frost tender.

Bloom Time

• It flowers from April to May.

Interactions with Other Organisms

• It is a hybrid between a Sorbus and an Amelanchier.
• Hybrids in Maleae are often distinguished by their incompletely divided, deeply lobed leaves.

Further Information

• RHS (Royal Horticultural Society) provides help and information on Amelasorbus raciborskiana and Amelasorbus jackii.
• Consortium of Pacific Northwest Herbaria manages data on specimens from Idaho and Oregon.
• BONAP's North American Plant Atlas provides information and maps.