Taxon Report

Harmonia doris-nilesiae (T.W. Nelson & J.P. Nelson) B.G. Baldwin

Niles' harmonia

Print Report

Taxon Summary

Harmonia doris-nilesiae, commonly known as Niles' harmonia, is a annual herb in the Asteraceae that is found only in California. It occurs within Chaparral, Cismontane woodland, and Lower montane coniferous forest, growing at elevations from 650 to 1660 meters. Harmonia doris-nilesiae is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Harmonia doris-nilesiae (T.W. Nelson & J.P. Nelson) B.G. Baldwin
Common Name:	Niles' harmonia
Family:	Asteraceae
Element Code:	PDAST650L0
USDA Plants Symbol:	HADO2
Synonyms/Other Names:	Madia doris-nilesiae T.W. Nelson & J.P. Nelson

Ecology and Life History


Lifeform:	annual herb
Blooming Period: May-Jul	May-Jul
Elevation:	650-1660 (2135-5445)
General Habitats:	Chaparral, Cismontane woodland, Lower montane coniferous forest
Microhabitat:	Openings, Rocky, Serpentine (usually)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G2G3
State Rank:	S2S3
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_UCSC; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	25
Element Occurrence Ranks:
Excellent (A)	4
Good (B)	16
Fair (C)	2
Poor (D)	0
None (X)	0
Unknown (U)	3

Location


California Endemic: True
California Counties and Islands: Name (Code)
Shasta (SHA), Tehama (TEH), Trinity (TRI)
Quads: Name (Quad Code)
Dubakella Mtn. (4012342), Halfway Ridge (4012353), Hayfork (4012352), Hoosimbim Mtn. (4012258), Hyampom (4012354), Naufus Creek (4012343), Pony Buck Peak (4012331), Smoky Creek (4012332)

Threat List Data from the CNDDB


Threat List Total:	5
EOs with Threat Listed:	Total EOs	% of EOs
	22	88 %
Logging	11	44%
Non-native plant impacts	10	40%
Road/trail construction/maint.	10	40%
Other	3	12%
Mining	1	4%

Notes



Threatened by fuelbreaks, logging, mining, non-native plants, and road maintenance. A synonym of Madia doris-nilesiae in The Jepson Manual. See Brittonia 37(4):394-396 (1985) for original description, and Novon 9:462-471 (1999) for revised nomenclature.
Threats:

Taxonomy:

Selected References

USFS Potential Species of Conservation Concern Profile

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 26 February 2025].