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Montana Field Guide

Montana Field Guides

Dwarf Goldenweed - Ericameria nana
Other Names:  Haplopappus nanus

Potential Species of Concern

Global Rank: G5
State Rank: SH
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value:

External Links






State Rank Reason (see State Rank above)
Known from one 1952 collection south of Upper Red Rock Lake.
 
General Description
Dwarf Goldenweed is a low shrub with rigid, intricately branched stems that are up to 3 dm high. The spreading, alternate, entire-margined leaves are linear to narrowly lance-shaped, 10-15 mm long, and occur on the upper half of the stems. Clusters of much smaller leaves are borne in principal leaf axils. The stems and foliage are resinous. Few to several flower heads are borne on short stalks on the stem tips. Each head is 6-9 mm high and has 4-6 overlapping series of straw-colored, narrow involucral bracts with pointed green tips. The 3-10 yellow rays are 2-4 mm long, while the 4-10 yellow disk flowers are 4-7 mm long. The elongate achenes are glabrous to short-hairy and topped by numerous, white to tan bristles, forming a pappus of unequal length.

Phenology
Flowering in August.

Diagnostic Characteristics
The narrow leaves and varnished appearing foliage separate this species from other shrubby Haplopappusin our area. Species of Chrysothamnus either have larger leaves or stems closely covered with dense, white hair.

Species Range
Unknown/Undetermined
 


Range Comments
Eastern OR to southwest MT, south to CA, NV and UT. Peripheral.

Summary of Observations Submitted for Montana
Number of Observations: 1

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Dry, rocky soil and talus slopes in or near the montane zone.

References
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Citation for data on this website:
Dwarf Goldenweed — Ericameria nana.  Montana Field Guide.  .  Retrieved on , from