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Sedum paradisum

(Denton) Denton ex B.L. Wilson

Canyon Creek Stonecrop

G3Vulnerable (G3G4) Found in 17 roadless areas NatureServe Explorer →
G3VulnerableGlobal Rank
Medium - lowThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.1212981
Element CodePDCRA0A2A0
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., B.L. Wilson, R.E. Brainerd, N. Otting, S. Darington, B.J. Knaus, and J.K. Nelson. 2018. A review of Sedum section Gormania (Crassulaceae) in western North America. Phytotaxa 368(1): 1- 61.
Taxonomic Comments
In the treatment by Zika et al. (2018), Sedum paradisum is segregated from S. obtusatum, raised to species level, and two subspecies are defined. "Plants of the northern Sierra Nevada were newly defined as S. paradisum ssp. subroseum, separable with nodding young flowering shoots and a disjunct range in Butte, Plumas and Sierra counties" (Zika et al. 2018).
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2021-06-28
Change Date2021-06-28
Edition Date2021-06-28
Edition AuthorsTomaino, A. (2021)
Threat ImpactMedium - low
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences21 - 80
Rank Reasons
Sedum paradisum is endemic to northern California. Two geographically separated subspecies are recognized. Threats include road construction, foot traffic, logging, and off-highway vehicles.
Range Extent Comments
Subspecies paradisum occurs in the Trinity Mountains in Shasta and Trinity counties, California (Flora of North America Editorial Committee 2009; Baldwin et al. 2012; Zika et al. 2018). Subspecies subroseum occurs in the northern Sierra Nevada, in Butte, Plumas and Sierra counties, California (Zika et al. 2018). There is geographic separation between the two subspecies. "Between their ranges lies Lassen Peak and a large area affected by its eruptions. Appropriate habitat for Sedum is limited in this area because most rock outcrops were recently exposed and excessively dry. We hypothesize that any Sedum paradisum once present in this area was killed by the eruptions of Lassen Peak in 1914, or in previous volcanic episodes dating back 27,000 years" (Zika et al. 2018).
Occurrences Comments
Based on specimen data (Zika et al. 2018) and CNDDB (2021) occurrence data, approximately 45-50 occurrences are estimated for the species.
Threat Impact Comments
Threats include road construction, foot traffic, logging, and off-highway vehicles (CNPS 2021, CNDDB 2021).
Ecology & Habitat

Habitat

Both subspecies of Sedum paradisum have similar habitats. Sedum paradisum ssp. paradium occurs on "rocky slopes, ridges, outcrops, and cliffs. The underlying bedrock is usually not serpentine" (Zika et al. 2018). Sedum paradisum ssp. subroseum occurs on "rocky slopes, ridgelines, and dry cliffs, in full sun to partial shade, on a variety of bedrock types including peridotite, andesite, and granite" (Zika et al. 2018).
Terrestrial Habitats
SavannaBarrensBare rock/talus/screeCliff
Other Nations (1)
United StatesN3
ProvinceRankNative
CaliforniaSNRYes
Threat Assessments
ThreatScopeSeverityTiming
4 - Transportation & service corridorsRestricted (11-30%)Moderate or 11-30% pop. decline—
5 - Biological resource useRestricted (11-30%)Serious - moderate—
5.3 - Logging & wood harvestingRestricted (11-30%)Serious - moderate—
6 - Human intrusions & disturbanceRestricted (11-30%)Slight or 1-10% pop. decline—
6.1 - Recreational activitiesRestricted (11-30%)Slight or 1-10% pop. decline—

—

Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (17)
California (17)
AreaForestAcres
Bucks LakePlumas National Forest680
Chips CreekPlumas National Forest12,940
East GirardShasta-Trinity National Forest27,894
East YubaTahoe National Forest17,968
Fisher Gulch BShasta-Trinity National Forest4,791
Lakes BasinTahoe National Forest557
Little French CShasta-Trinity National Forest11,529
Middle ForkPlumas National Forest29,278
Middle YubaTahoe National Forest7,379
Orleans Mtn.Klamath National Forest49,090
PantherShasta-Trinity National Forest12,016
PattisonShasta-Trinity National Forest29,299
South ForkShasta-Trinity National Forest16,786
Weaver BallyShasta-Trinity National Forest829
West GirardShasta-Trinity National Forest37,516
West YubaPlumas National Forest6,071
West YubaTahoe National Forest16,059
References (7)
  1. Baldwin, B. G., D. H. Goldman, D. J. Keil, R. Patterson, T. J. Rosatti, and D. H. Wilken, eds. 2012. The Jepson manual: vascular plants of California. 2nd edition. University of California Press, Berkeley, CA. 1568 pp.
  2. California Native Plant Society (CNPS). 2021. Inventory of Rare and Endangered Plants of California (online edition, v8-03 0.39). California Native Plant Society, Sacramento, CA. Online. Available: http://www.rareplants.cnps.org (accessed 2021).
  3. California Natural Diversity Database (CNDDB). 2021. RareFind Version 5.2.14. California Department of Fish and Game, Sacramento.
  4. Denton, M. F. 1978. Two new taxa of <i>Sedum </i>section <i>Gormania </i>(Crassulaceae) endemic to the Trinity Mountains in California. Brittonia 30(2):233-238.
  5. Flora of North America Editorial Committee (FNA). 2009. Flora of North America north of Mexico. Vol. 8. Magnoliophyta: Paeoniaceae to Ericaceae. Oxford University Press, New York. xxiv + 585 pp.
  6. Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.
  7. 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.