Home/Species/ Yellow-star Mariposa Lily

Calochortus monophyllus

(Lindl.) Lem.

Yellow-star Mariposa Lily

G4Apparently Secure Found in 10 roadless areas NatureServe Explorer →

G4Apparently SecureGlobal Rank

UnknownThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.135023

Element CodePMLIL0D0X0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single nation

KingdomPlantae

PhylumAnthophyta

ClassMonocotyledoneae

OrderLiliales

FamilyLiliaceae

GenusCalochortus

Concept Reference

Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

Conservation Status

Rank Method Rank calculation - Biotics v2

Review Date2023-06-23

Change Date2023-06-23

Edition Date2023-06-23

Edition AuthorsVrilakas, Sue (1999), rev. Eberly (2023)

Threat ImpactUnknown

Range Extent20,000-200,000 square km (about 8000-80,000 square miles)

Number of Occurrences> 300

Rank Reasons

Calochortus monophyllus is a wide ranging perennial herb occurring in northern California and southern Oregon in the western United States. This species has a large range extent, over 800 occurrences, nonspecific habitat preferences, relatively minimal threats, and many occurrences on public lands.

Range Extent Comments

Calochortus monophyllus occurs in the western United States where it is found in southern Oregon (Jackson County) but more commonly in northern California in the Cascade Mountain Range and foothills and the High Sierra Nevada and foothills (Jepson Flora Project 2023). Range extent was estimated using herbarium specimens, photo-based observations, and NatureServe Network occurrence data collected between 1992 and 2023 (GBIF 2023, iNaturalist 2023, SEINet 2023).

Occurrences Comments

This species is common in the mountains and foothills of northern California, but rare in Oregon where it is known from one occurrence. By applying a 1 km separation distance to herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1992 and 2023, it is estimated that there are over 800 occurrences rangewide (CCH2 2023, GBIF 2023, iNaturalist 2023).

Threat Impact Comments

Specific threats to the populations for all of the occurrences are not known. Moderate threats may exist due to the mid to low elevations where they occur making them susceptible to timber harvest, grazing, mining and rural development.

Ecology & Habitat

Habitat

Calochortus monophyllus grows in wooded areas on clay-loam soils, usually on slopes, at elevations of 400 to 1,200 m (FNA 2002a, Jepson Flora Project 2023). In Oregon, it is reported from a rocky ridge at 5,760 feet in white fir (Abies concolor) plant association.

Terrestrial Habitats

Woodland - ConiferWoodland - Mixed

Other Nations (1)

United StatesN4

Province	Rank	Native
Oregon	S1	Yes
California	SNR	Yes

Plant Characteristics

DurationPERENNIAL

Economic Value (Genus)No

Roadless Areas (10)

California (10)

Area	Forest	Acres
Bald Rock	Plumas National Forest	4,675
Cub Creek	Lassen National Forest	8,643
Duncan Canyon	Tahoe National Forest	8,621
Ishi	Lassen National Forest	21,805
Middle Fork	Plumas National Forest	29,278
Middle Yuba	Tahoe National Forest	7,379
Mill Creek	Lassen National Forest	7,587
North Fork American River	Tahoe National Forest	38,495
North Fork Middle Fork American River	Tahoe National Forest	11,245
Polk Springs	Lassen National Forest	9,466

References (6)

CCH2 Portal. 2023. Consortium of California Herbaria. Online. Available: https//:www.cch2.org/portal/index.php (accessed 2023).
Flora of North America Editorial Committee (FNA). 2002a. Flora of North America north of Mexico. Vol. 26. Magnoliophyta: Liliidae: Liliales and Orchidales. Oxford Univ. Press, New York. xxvi + 723 pp.
Global Biodiversity Information Facility (GBIF). 2023. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2023).
iNaturalist. 2023. Online. Available: https://www.inaturalist.org (accessed 2023).
Jepson Flora Project (eds.) 2023. Jepson eFlora. Online. Available: https://ucjeps.berkeley.edu/eflora/ (accessed 2023).
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.