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Allium macropetalum (Largeflower onion)
Anderson, Wynn

Allium macropetalum

Allium macropetalum Rydb.

Largeflower Onion, Large-petal Onion, Desert Onion, Desert Onion Lily

Liliaceae (Lily Family)


USDA Symbol: ALMA4

USDA Native Status: L48 (N)

Large-petal or Desert Onion is a low, desert species with narrowly linear leaves and pink-striped, six-petaled flowers in a cluster at the top of a separate stem.


From the Image Gallery

16 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Complexity: Simple
Fruit Type: Capsule
Size Notes: Flower scape up to about 8 inches tall.
Fruit: Seeds black.

Bloom Information

Bloom Color: White , Pink
Bloom Time: Mar , Apr , May , Jun
Bloom Notes: Pale pink to almost white, with darker pink midveins.


USA: AZ , CO , NM , TX , UT
Native Distribution: E. UT & w. CO, s. to AZ & TX
Native Habitat: Open deserts

Growing Conditions

Light Requirement: Sun
Soil Moisture: Dry
Soil Description: Rocky soils.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Tohono Chul Park, Inc. - Tucson, AZ


Bibref 995 - Native Landscaping from El Paso to L.A. (2000) Wasowski, S. and A. Wasowski

Search More Titles in Bibliography

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Allium macropetalum in USDA Plants
FNA: Find Allium macropetalum in the Flora of North America (if available)
Google: Search Google for Allium macropetalum


Record Modified: 2023-04-10
Research By: TWC Staff

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