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Montana Field Guide

Montana Field Guides

Orange Hawkweed - Hieracium aurantiacum

Noxious Weed: Priority 2A
Exotic Species (not native to Montana)

Global Rank: GNR
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 0

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General Description
Fibrous-rooted from a rhizome; stoloniferous. Stems erect, simple subscapose, 10–70 cm. Herbage sparsely long-hirsute, stellate-hairy, stipitate-glandular above. Leaves mainly basal, petiolate; blades oblanceolate, 3–15 cm long, entire. Heads 3 to 12, clustered; involucres campanulate, 5–9 mm high; phyllaries linear-lanceolate, stellate-hairy, stipitate-glandular, sparsely setose-hirsute. Rays 25 to 100, red to orange; ligules 6–8 mm long. Achenes ca. 2 mm long; pappus white (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Unknown/Undetermined
 


Range Comments
Introduced to most of non-arid, temperate N. America; native to Europe (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 50

(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
Disturbed soil of forest openings, rock slides, roadsides, lawns; valleys to lower subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Orange Hawkweed — Hieracium aurantiacum.  Montana Field Guide.  .  Retrieved on , from