CNPS

CNPS Rare Plant Inventory



Taxon Details

Harmonia doris-nilesiae

Niles' harmonia

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Photo of Harmonia doris-nilesiae
©2013 Julie Kierstead Nelson 		Photo of Harmonia doris-nilesiae
©2013 Julie Kierstead Nelson 		Photo of Harmonia doris-nilesiae
©2019 Steve Matson

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:
Name Status: JEF, FNA, POWO,
IPNI, Tropicos

  Conservation Status

CA Rare Plant Rank: 1B.1
Fed List: None
State List: None
Global Rank: G2G3
State Rank:
 S2S3
Other Status: BLM_S; SB_UCSC; USFS_S
CRPR Changes:
Add Date: 1988-01-01
Date Edited: 2024-11-05

  Ecology and Life History

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

  Notes

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:

  Threat List Data from the CNDDB

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

  Occurrence Data from the CNDDB

Total Occurrences: 25
Element Occurrence Ranks:
A B C D X U
4 16 2 0 0 3
Occurrence Status:
Historical >20 Years 22
Recent <=20 Years 3
Presence:
Presumed Extant 25
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
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)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Regional Map

  Map

Presumed Extant
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

Other: USFS Potential Species of Conservation Concern Profile

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Suggested Citation:
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 8 July 2025].
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