Difference between revisions of "Allium amplectens"

From Puget Prairie Plants
Line 1: Line 1:
'''''Allium amplectens''''', or the narrowleaf onion, is a flowering plant of the Liliaceae family.
'''''Allium amplectens''''', or the narrowleaf onion, is a flowering plant of the Liliaceae family.
[[File:Allium amplectens Pinnacles2.jpg|right|350px|Allium amplectens]]
'''Abbreviation Code:''' ALAM
'''Abbreviation Code:''' ALAM
[[File:Allium amplectens Pinnacles2.jpg|right|350px|Allium amplectens]]  <br><br>'''Synonyms:'''
*''Allium acuminatum Hook. var. gracile''
*''Allium acuminatum Hook. var. gracile''
*''Allium attenuifolium Kellogg''
*''Allium attenuifolium Kellogg''

Revision as of 11:01, 11 May 2012

Allium amplectens, or the narrowleaf onion, is a flowering plant of the Liliaceae family.

Allium amplectens

Abbreviation Code: ALAM


  • Allium acuminatum Hook. var. gracile
  • Allium attenuifolium Kellogg
  • Allium attenuifolium Kellogg var. monospermum
  • Allium monospermum Jepson
  • Allium occidentale Gray
  • Allium serratum S. Watson [1]


  • Kingdom Plantae – Plants
  • Subkingdom Tracheobionta – Vascular plants
  • Superdivision Spermatophyta – Seed plants
  • Division Magnoliophyta – Flowering plants
  • Class Liliopsida – Monocotyledons
  • Subclass - Liliidae
  • Order - Liliales
  • Family Liliaceae – Lily family
  • Genus Allium L. – onion
  • Species Allium amplectens Hook. – narrowleaf onion


Perennial growing from sometimes clustered and ovoid bulbs. Stem somewhat cylindrical, 15-50 cm tall. 2-4 slender leaves growing from the scape that wither early. Almost spherical multi-flowered white or pink umbels. Tepals 6; pedicals slender 1-2 times length of tepals. Stamens 6 and as long as the tepals. Tepals become papery and converge over fruit with maturity, the fruit 3-celled and 6-seeded.[2] [3]

Bloom Period

May-July [2]

Distribution of the narrowleaf onion


California, Oregon, Washington, and British Columbia.


Open or wooded areas with clay soils [3]


The bulbs were occasionally eaten by some northwest coast indigenous peoples. *This is a restricted species; please do not harvest.




Seed sample from: 2011

Average Measurement: 2.1 x 1.7 x 1.7

Measurement Range: L: 1.8 - 2.5, W: 1.5 - 1.8, D: 1.3 - 1.75


Shape: Seeds narrow at hilum end, broadening at opposite apex.

Color: Seeds black. Hilum beige to white.

Surface: Seed’s most distinct feature is extreme puckering or wrinkling. Some seeds have concave pitting, ridging, or some net veined patterns. Seeds roughly textured and matte.

Latitudinal Cross Section: elliptical ALAM-lat-crosssection.png

Longitudinal Cross Section: elliptical ALAM-long-crosssection.png

Allium amplectens
Allium amplectens

Basic Explanations and Assumptions:

The dimensions for the seeds are length x width x depth. The location of the hilum is used as the base of the seed, and the length is measured from hilum to the opposite apex. Where a style is present, the length is measured from the hilum to the bottom of the style. Width is measured at a right angle to the length at the widest part. Depth is measured at a right angle to the intersection of height and width lines.

Measurements included are the mean average for each measurement of ten separate seeds.

All measurements in millimeters unless otherwise noted.

Photo Gallery


  1. Washington Flora Checklist
  2. 2.0 2.1 WTU Herbarium
  3. 3.0 3.1 Jepson Flora Project