Lewisia taylorii
J. O'Brien, C.M. Guilliams, S.A. Puentes, & L. Lindstrand
Trinity Lewisia
G2ImperiledGlobal Rank
Medium - lowThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.1367178
Element CodePDPOR040N0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderCaryophyllales
FamilyMontiaceae
GenusLewisia
Concept ReferenceO'Brien, J., C.M. Guilliams, S. Puentes, and L. Lindstrand. 2024. A a new species of Lewisia (Montiaceae) from the southeastern Klamath Mountains, California. Madroño 71(3): 136-142.
Taxonomic CommentsO'Brien et al. (2024) describe Lewisia taylorii as a new species. "When discovered, the taxon best fit the description of L. kelloggii ssp. hutchisonii, though morphological traits visible in the field suggested it might be a novel species. Recent morphometric and genetic analysis confirmed this suspicion" (O'Brien et al. 2024). In addition, "the geographic range of L. taylorii is outside the range of L. kelloggii" (O'Brien et al. 2024).
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2025-08-19
Change Date2025-08-19
Edition Date2025-08-19
Edition AuthorsTomaino, A. (2025)
Threat ImpactMedium - low
Range Extent<100 square km (less than about 40 square miles)
Number of Occurrences21 - 80
Rank ReasonsLewisia taylorii is narrowly endemic to the southeastern Klamath Mountains, California, where it is known from approximately 22 occurrences. Although it is uncommon, it shows persistence in disturbed areas, and occurs in relatively remote areas.
Range Extent Comments"Lewisia taylorii is endemic to the western Trinity Mountains portion of the southeastern Klamath Ranges, east of the Trinity Alps" in northern California (O'Brien et al. 2024).
Occurrences Comments"The species is currently known from 22 occurrences at four general areas around Trinity Lake" (O'Brien et al. 2024).
Threat Impact Comments"Lewisia taylorii occurrences are located in remote settings. Habitats at or near all known occurrences have been subject to historical and recent wildfire, forest road and fuelbreak construction, fire suppression disturbance, and historic or recent timberland management. These areas receive occasional to infrequent human visitation, mainly during hunting season and through various forest management" (O'Brien et al. 2024). O'Brien et al. (2024) estimate that less than 20% of occurrences are threatened.
Ecology & Habitat
Habitat
Lewisia taylorii occurs on open, often disturbed gravelly-shaley slopes in conifer forest and chaparral (O'Brien et al. 2024). Plants occur in "forest openings and disturbed habitats including native surface forest road shoulders, skid trails from historic and recent timber harvest, and conifer forest plantations established following timberland management. They are also found on all aspects, level to very steep slopes, and include locations ranging from barren ridgelines to forests with moderate overstory canopy cover" (O'Brien et al. 2024).
Terrestrial HabitatsForest/WoodlandForest - ConiferForest EdgeShrubland/chaparralBarrens
Other Nations (1)
United StatesN2
| Province | Rank | Native |
|---|
| California | S2 | Yes |
Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (1)
California (1)
| Area | Forest | Acres |
|---|
| Lake Eleanor | Shasta-Trinity National Forest | 397 |
References (1)
- O'Brien, J., C.M. Guilliams, S. Puentes, and L. Lindstrand. 2024. A a new species of <i>Lewisia </i>(Montiaceae) from the southeastern Klamath Mountains, California. Madroño 71(3): 136-142.