Home/Species/ Dedecker's Clover

Trifolium dedeckerae

J.M. Gillett

Dedecker's Clover

G2Imperiled Found in 7 roadless areas NatureServe Explorer →

G2ImperiledGlobal Rank

UnknownThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.140747

Element CodePDFAB400Q0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single state or province

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderFabales

FamilyFabaceae

GenusTrifolium

Synonyms

Trifolium kingii ssp. dedeckerae(J. Gillett) D. HellerTrifolium macilentum var. dedeckerae(J. Gillett) Barneby

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 Date2026-06-10

Change Date1987-08-06

Edition Date2026-06-10

Edition AuthorsD. Gries, rev. R. Bittman (7/98), rev. Maybury (2003), rev. Eberly (2026)

Threat ImpactUnknown

Range Extent5000-20,000 square km (about 2000-8000 square miles)

Number of Occurrences6 - 20

Rank Reasons

Trifolium dedeckerae occurs in the western United States where it is endemic to high elevations in the southern Sierra Nevada of California. There are less than twenty occurrences known. Surveys are needed to identify threats to this species.

Range Extent Comments

Trifolium dedeckerae occurs in the western United States where it is endemic to high elevations in the southern Sierra Nevada of California in Inyo, Kern, Mono, and Tulare counties (Skinner 1997, Jepson Flora Project 2026). Range extent was estimated using NatureServe Network occurrence data (RARECAT 2025, CNDDB 2026, NatureServe 2026)

Occurrences Comments

This species is known from fourteen occurrences, two of which have been seen in the last twenty years (CNDDB 2026).

Threat Impact Comments

This species is potentially threatened by roads, mining, and grazing (CNDDB 2026, CNPS 2026).

Ecology & Habitat

Habitat

This species is often in cracks of granite outcrops and on gravelly slopes at 2,100-3,500 m elevation. It is found in pinyon-juniper woodlands, lower and upper montane coniferous forests, and subalpine coniferous forests (CNDDB 2026).

Terrestrial Habitats

Forest/WoodlandForest - ConiferWoodland - ConiferBare rock/talus/scree

Other Nations (1)

United StatesN2

Province	Rank	Native
California	S2	Yes

Plant Characteristics

DurationPERENNIAL

Economic Value (Genus)Yes

Roadless Areas (7)

California (7)

Area	Forest	Acres
Birch Creek	Inyo National Forest	28,816
Domeland Add.	Sequoia National Forest	3,046
Rincon	Sequoia National Forest	54,610
Scodies	Sequoia National Forest	725
South Sierra	Sequoia National Forest	8,008
Wonoga Pk.	Inyo National Forest	11,272
Woodpecker	Sequoia National Forest	11,936

References (8)

Bittman, R. 1998. Lead Botanist, California Natural Diversity Database. Unpublished notes on fifty rare plants of California for purposes of updating Element Global Ranking (EGR) forms. California Natural Heritage Division, Dep. of Fish & Game, Sacramento, California, U.S.A.
California Native Plant Society (CNPS), Rare Plant Program. 2026. Inventory of Rare and Endangered Plants of California, online edition, v9.5. Online. Available: https://www.rareplants.cnps.org (accessed 2026).
California Natural Diversity Database (CNDDB). 2026. RareFind Version 5.3.0. California Department of Fish and Game, Sacramento.
Jepson Flora Project (eds.) 2026. Jepson eFlora. Online. Available: https://ucjeps.berkeley.edu/eflora/ (accessed 2026).
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.
NatureServe. 2026. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
<p>NatureServe's Rapid Analysis of Rarity and Endangerment Conservation Assessment Tool (RARECAT). 2025. Version: 2.1.1 (released April 04, 2025).</p>
Skinner, M.W., and B.M. Pavlik, eds. 1997 (1994). Inventory of rare and endangered vascular plants of California. 1997 Electronic Inventory Update of 1994 5th edition, California Native Plant Society, Special Publication No. 1, Sacramento.