Taxon Report

Trifolium dedeckerae J.M. Gillett

Dedecker's clover

Print Report

Taxon Summary

Trifolium dedeckerae, commonly known as Dedecker's clover, is a perennial herb in the Fabaceae that is found only in California. It occurs within Lower montane coniferous forest, Pinyon and juniper woodland, Subalpine coniferous forest, and Upper montane coniferous forest, growing at elevations from 2100 to 3500 meters. Trifolium dedeckerae is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Trifolium dedeckerae J.M. Gillett
Common Name:	Dedecker's clover
Family:	Fabaceae
Element Code:	PDFAB400Q0
USDA Plants Symbol:	TRDE4
Synonyms/Other Names:	Trifolium macilentum Greene var. dedeckerae (Gillett) Barneby Trifolium kingii ssp. dedeckerae

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May-Jul	May-Jul
Elevation:	2100-3500 (6890-11485)
General Habitats:	Lower montane coniferous forest, Pinyon and juniper woodland, Subalpine coniferous forest, Upper montane coniferous forest
Microhabitat:	Granitic, Rocky
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_CalBG/RSABG; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	14
Element Occurrence Ranks:
Excellent (A)	2
Good (B)	1
Fair (C)	1
Poor (D)	0
None (X)	0
Unknown (U)	10

Location


California Endemic: True
California Counties and Islands: Name (Code)
Inyo (INY), Kern (KRN), Mono (MNO), Tulare (TUL)
Quads: Name (Quad Code)
Bartlett (3611841), Bonita Meadows (3611813), Coso Peak (3611726), Crooked Creek (3711841), Haiwee Pass (3611821), Kearsarge Peak (3611873), Lamont Peak (3511871), Mt. Barcroft (3711852), Mt. Williamson (3611863), Olancha (3611831), Station Peak (3711851)

Threat List Data from the CNDDB


Threat List Total:	3
EOs with Threat Listed:	Total EOs	% of EOs
	3	21 %
Grazing	2	14%
Non-native plant impacts	1	7%
Road/trail construction/maint.	1	7%

Notes



Possibly threatened by mining and grazing. A synonym of T. macilentum var. dedeckerae in The Jepson Manual (1993), and T. kingii ssp. dedeckerae in TJM 2. See Madroño 21(7):451-455 (1972) for original description.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 1 June 2025].