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Sego Lily, Nuttall's Mariposa
Calochortus nuttallii

Family: Liliaceae (lil-ee-AY-see-ee) (Info)
Genus: Calochortus (kal-uh-KOR-tus) (Info)
Species: nuttallii (nut-AL-ee-eye) (Info)


Alpines and Rock Gardens




under 6 in. (15 cm)

6-12 in. (15-30 cm)

12-18 in. (30-45 cm)


3-6 in. (7-15 cm)

6-9 in. (15-22 cm)


USDA Zone 3b: to -37.2 C (-35 F)

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Full Sun

Sun to Partial Shade



Bloom Color:


Magenta (Pink-Purple)


White/Near White

Bloom Time:

Late Spring/Early Summer



Other details:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

This plant may be considered a protected species; check before digging or gathering seeds

Suitable for growing in containers

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:

Unknown - Tell us

Propagation Methods:

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds

Properly cleaned, seed can be successfully stored


This plant has been said to grow in the following regions:

Deweyville, Utah

Moab, Utah

Gardeners' Notes:


On Jun 13, 2004, Lophophora from Tokyo
Japan wrote:

Calochortus nuttalli is the eastern-most representative of the genus. It's found " the western parts of North and South Dakota, in eastern Montana, most of Nebraska, western Colorado, extreme northwestern New Mexico, most of Utah, and northwestern Arizona, with several disjunct populations in Nevada." (Callahan, 2001) I have seen some claims of it occuring in California, but as the Jepson Manual doesn't list it, these must be considered with suspicion.

C. nuttalli is a member of Section II. Mariposa, Subsection 7. Nuttalliani (Glands circular-depressed, mostly surrounded by a broad membrane; bulbs with membranous tunics; seeds flat; chromosome base number eight.) (Callahan, "The Genus Calochortus" in "Bulbs of North America", Timber Press, 20... read more