Definition
Mahonia imbricata is a species of evergreen shrub in the family Berberidaceae. It belongs to the genus Mahonia, which comprises plants commonly known as Oregon grape.
Overview
The species is native to parts of southwestern China, with documented occurrences in the provinces of Yunnan and Sichuan. It typically grows in forested, mountainous regions at elevations ranging from 1,500 to 2,800 m. Like many Mahonia species, it is cultivated in horticulture for its ornamental foliage and yellow flower clusters, though it is less widely known than some congeners.
Etymology / Origin
The specific epithet imbricata derives from the Latin imbricatus, meaning “overlapping like roof tiles.” This name likely refers to the arrangement of the plant’s leaves or bracts, which may overlap each other in an imbricate fashion. The genus name Mahonia honors the American botanist Bernard McMahon (1775–1816), whose Latinized name “Mahonia” was assigned by Thomas Nuttall in 1818.
Characteristics
- Growth form: Woody shrub, typically 1–2 m tall, sometimes reaching up to 3 m in optimal conditions.
- Leaves: Evergreen, pinnately compound; each leaf is composed of 5–9 leaflets that are glossy, leathery, and display a dark green upper surface with a lighter, often slightly spiny underside. The leaf arrangement may exhibit an imbricate pattern.
- Inflorescence: Produces terminal racemes or panicles of bright yellow, fragrant flowers. Flowering usually occurs in late spring to early summer.
- Fruit: Produces small, bluish-black berries that mature in late summer to early autumn; each berry contains several seeds.
- Habitat preferences: Prefers well‑drained, acidic soils and partial shade but can tolerate full sun in cooler climates. It is moderately drought‑tolerant once established.
- Conservation status: Not evaluated by the IUCN; regional assessments indicate it is not currently considered threatened, though habitat loss in parts of its native range could impact local populations.
Related Topics
- Mahonia (genus): Overview of the larger genus, including taxonomy, distribution, and economic uses.
- Berberidaceae: The plant family to which Mahonia belongs, encompassing related genera such as Berberis.
- Oregon grape: Common name for several Mahonia species, highlighting horticultural and medicinal applications.
- Flora of China: Comprehensive reference work documenting plant species native to China, including Mahonia imbricata.
- Imbricate leaf arrangement: Botanical term describing overlapping leaf or scale patterns, relevant to the species epithet.