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Allium platycaule
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Flat Stemmed Onion
( Allium platycaule )
Allium platycaule
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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2 Nurseries Carry This Plant
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About Flat Stemmed Onion (Allium platycaule)
2 Nurseries Carry This Plant
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Allium platycaule
is a species of wild onion known by the common name broadstemmed onion or flat-stem onion. It is native to northeastern California and nearby parts of Oregon and Nevada where it is found on slopes of some elevation. This onion grows from a gray bulb two to three centimeters wide and has a flattened stem which may bulge in the middle and narrow to thin wings along the sides. The long, flat leaves are sickle-shaped. Atop the stem is an flower cluster which may have as many as 90 flowers in it. Each flower may be up to a centimeter and a half wide but the petals are quite narrow so as to be almost threadlike. The flower cluster therefore may be a dense ball of filaments. The flowers are generally bright pink to magenta. The leaves, bulbs, and seeds were utilized as food by the Paiute people.
Plant Description
Plant Type
Perennial herb
Flower Color
Pink
Flowering Season
Spring
Wildlife Supported
Butterflies & moths hosted ( 13
likely
* )
SHOW ALL
*
Alfalfa Looper Moth
Autographa californica
Autographa californica
*
Armyworm Moth
Mythimna unipuncta
Mythimna unipuncta
*
Ipsilon Dart
Agrotis ipsilon
Agrotis ipsilon
*
Western Yellowstriped Armyworm
Spodoptera praefica
Spodoptera praefica
*
Salt Marsh Moth or Acrea Moth
Estigmene acrea
Estigmene acrea
*
Fruit-Tree Leafroller Moth
Archips argyrospila
Archips argyrospila
*
Garden Tiger Moth
Arctia caja
Arctia caja
Landscaping Information
Sun
Full Sun
Moisture
Very Low
Nurseries
Carried by 2
Ease of Care
Moderately Easy
Soil Drainage
Fast
Common uses
Bee Gardens
Sunset Zones
?
1, 2, 3, 7, 14, 15, 16, 17, 18
Natural Setting
Site Type
Rocky or sandy slopes
Climate
Annual Precipitation: 12.4" - 120.2", Summer Precipitation: 0.28" - 4.08", Coldest Month: 25.5" - 43.2", Hottest Month: 46.2" - 73.6", Humidity: 1.03" - 19.93", Elevation: 947" - 10194"
Alternative Names
Common Names
: Broad-stemmed Onion, Broadstemmed Onion, Flat-stem Onion, Flat-stemmed Onion
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Flat Stemmed Onion
Allium platycaule
Sources include:
Wikipedia
. All text shown in the "About" section of these pages is available under the
Creative Commons Attribution-ShareAlike License
. Plant observation data provided by the participants of the
California Consortia of Herbaria
, Sunset information provided by
Jepson Flora Project
. Propogation from seed information provided by the
Santa Barbara Botanical Garden
from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include
CalPhotos
,
Wikimedia Commons
, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include
Calflora
,
CNPS Manual of Vegetation Online
,
Jepson Flora Project
,
Las Pilitas
,
Theodore Payne
,
Tree of Life
,
The Xerces Society
, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from
PRISM Climate Group, Oregon State University
, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.
Links:
Jepson eFlora Taxon Page
CalPhotos
Wikipedia
Calflora
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