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

Allium amplectens Hook.
slimleaf onion (narrowleaf onion)
Amaryllidaceae (Lily family)
(Previously in Liliaceae)

Introduction to Vascular Plants

© Rod Innes  Email the photographer   (Photo ID #6768)

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Distribution of Allium amplectens
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Species Information

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Perennial herb from an egg-shaped to nearly globe-shaped, scaly bulb, the outer scales brownish to grey, with a wavy, fibrous network, the inner scales red or white; flowering stems erect, 10-40 cm tall, slender, round in cross-section, smooth.
Basal leaves 2 to 4, withering early, linear, channeled to cylindric, shorter than the flowering stem, very slender, smooth, the margins entire; stem leaves lacking.
Inflorescence a compact, often head-like, terminal umbel of several to many, stalked flowers, above 2 to 3 membranous, egg-shaped bracts, the stalks 0.5-1.5 cm long; flowers white to pink, saucer-shaped, of 6 distinct tepals, the tepals 5-9 mm long, lanceolate with pointed tips, spreading, in fruit becoming papery and folding over the ovaries; stamens 6, nearly as long as the tepals; pistil 1, 3-chambered.
Capsules, more or less egg-shaped, 3-lobed, with 6 low, rounded crests; seeds 6 or fewer, black.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Vernally moist rocky bluffs and meadows in the lowland zone; infrequent on SE Vancouver Island, the Gulf Islands and the adjacent mainland (Powell River); S to CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Allium amplectens

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres)
Slope Gradient (%) 45 45 45
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
180 180 180
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in:


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

Allium attenuifolium Kellogg
Allium monospermum Jeps.
Allium occidentale A. Gray

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References