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Sedum citrinum

Zika

Blue Creek Stonecrop

G2Imperiled Found in 4 roadless areas NatureServe Explorer →
G2ImperiledGlobal Rank
MediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.947367
Element CodePDCRA0A200
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderRosales
FamilyCrassulaceae
GenusSedum
Concept Reference
Zika, P.F. 2014. A new species of stonecrop (Sedum section Gormania, Crassulaceae) from northern California. Phytotaxa 159(2): 111-121.
Taxonomic Comments
Sedum citrinum is distinguished by its "flattened inflorescence with elongate lower branches, as well as its deep yellow flowers and yellow anthers" (Zika 2014).
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2020-12-31
Change Date2015-05-13
Edition Date2020-12-31
Edition AuthorsTomaino, A. (2020)
Threat ImpactMedium
Range Extent100-250 square km (about 40-100 square miles)
Number of Occurrences6 - 20
Rank Reasons
Sedum citrinum is known only from a small area in the Klamath Mountains of southern Del Norte County, California. There are approximately eleven occurrences known. Threats include road-widening, road maintenance, and off-road vehicles.
Range Extent Comments
Sedum citrinum is known from ultramafic bedrock in the Klamath Mountains of southern Del Norte County, California; it is known from the ridges between Red Mountain and South Red Mountain (Zika 2014).
Occurrences Comments
There are eleven occurrences in California, ten of which were observed within the last seven years (NatureServe Network Database as of December 2020).
Threat Impact Comments
Threats include road-widening, road maintenance, and off-road vehicles (Zika 2014). Rock quarrying, fire suppression, and horticultural collecting may also be threats (CNDDB 2020; CNPS 2020).
Ecology & Habitat

Habitat

Known from "sunny dry thin soils of serpentine (ultramafic) exposures, on talus or scree, in crevices or between boulders, on flats or ground gently sloping east or west, and on adjacent roadcuts, at elevations of 1050-1235" (Zika 2014). Occurs adjacent to North Coast coniferous forest (CNPS 2020; Zika 2014).
Terrestrial Habitats
Forest/WoodlandForest - ConiferGrassland/herbaceousBare rock/talus/scree
Other Nations (1)
United StatesN2
ProvinceRankNative
CaliforniaS2Yes
Threat Assessments
ThreatScopeSeverityTiming
3 - Energy production & miningRestricted (11-30%)Moderate or 11-30% pop. decline—
3.2 - Mining & quarryingRestricted (11-30%)Moderate or 11-30% pop. decline—
4 - Transportation & service corridorsRestricted (11-30%)Moderate or 11-30% pop. decline—
5 - Biological resource useSmall (1-10%)Slight or 1-10% pop. decline—
5.2 - Gathering terrestrial plantsSmall (1-10%)Slight or 1-10% pop. decline—
6 - Human intrusions & disturbanceRestricted (11-30%)Moderate or 11-30% pop. decline—
6.1 - Recreational activitiesRestricted (11-30%)Moderate or 11-30% pop. decline—
7 - Natural system modificationsRestricted (11-30%)Moderate or 11-30% pop. decline—
7.1 - Fire & fire suppressionRestricted (11-30%)Moderate or 11-30% pop. decline—

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Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (4)
California (4)
AreaForestAcres
Blue Creek Rare ISix Rivers National Forest12,134
Ship MountainSix Rivers National Forest11,936
SiskiyouKlamath National Forest54,039
Siskiyou BSix Rivers National Forest18,871
References (5)
  1. Boyd, S., and M.F. Denton 2017, <i>Sedum citrinum</i>, in Jepson Flora Project (eds.) Jepson eFlora, Revision 5. Online. Available: https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=100425 (accessed 2020).
  2. California Native Plant Society (CNPS). 2020. Inventory of Rare and Endangered Plants (online edition, v8-03 0.39). California Native Plant Society, Sacramento, CA. Online. Available: http://www.rareplants.cnps.org (accessed 2020).
  3. California Natural Diversity Database (CNDDB). 2020. RareFind Version 5.2.14. California Department of Fish and Game, Sacramento.
  4. Zika, P.F. 2014. A new species of stonecrop (<i>Sedum </i>section <i>Gormania</i>, Crassulaceae) from northern California. Phytotaxa 159(2): 111-121.
  5. Zika, P.F., B.L. Wilson, R.E. Brainerd, N. Otting, S. Darington, B.J. Knaus, and J.K. Nelson. 2018. A review of <i>Sedum </i>section Gormania (Crassulaceae) in western North America. Phytotaxa 368(1): 1- 61.