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Kingdevil Hawkweed - Hieracium praealtum
Other Names:  King Devil

Noxious Weed: Priority 2A
Non-native Species

Global Rank: GNR
State Rank: SNA
(see State Rank Reason below)

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

External Links






State Rank Reason (see State Rank above)
Hieracium praealtum is part of the Meadow Hawkweed complex. Plants are native to Europe (FNA 2006). A conservation status rank is not applicable (SNA) because the plant is an exotic (non-native) in Montana that is not a suitable target for conservation activities.
 
General Description
PLANTS: Fibrous-rooted from a short rhizome, often stoloniferous. Stems erect, simple, subscapose, 30–80 cm. Herbage glabrate to sparsely long-hirsute. Source: Lesica et al. 2012.

LEAVES: Mainly basal, short-petiolate; blades oblanceolate, 3–10 cm long, entire. Source: Lesica et al. 2012.

INFLORESCENCE: Heads 10 to 30; involucres narrowly campanulate, 6–9 mm high; phyllaries scarious-margined, linear-lanceolate, sparsely stellate-hairy, stipitate-glandular, setose-hirsute. Rays 60 to 80, yellow; ligules 4–6 mm long. Achenes 1–2 mm long; pappus white. Source: Lesica et al. 2012.

Diagnostic Characteristics
Montana has about 4 native and 3 exotic Hawkweeds. Their species identification can be complex and confusing because species interbreed to form hybrids and some populations are apomictic (seed are asexually produced).

Hieracium caespitosum, Hieracium praealtum, Hieracium piloselloides, and Hiercium gracile have yellow flower heads while <Hieracium aurantiacum is our only Hawkweed with red-orange flowers heads.

Hieracium caespitosum has florets with pappus bristles in 1 series (single ring of bristles). Its upper stems and involucres have dense glandular setae (hairs), but Hieracium praealatum has scattered glandular setae mixed in with non-glandular setae (Lesica et al. 2012). Hieracium caespitosum has short stolons (when they are present). Hieracium praealatum is more likely to have stolons and when present they are longer and slender.

Hieracium praealtum Villers ex Gochnat has leaves with lower surfaces that have stellate (star-shaped) hairs (FNA 2006). In Lesica’s treatment in the Manual of Montana Vascular Plants (2012) our plants appear to better fit the description of Hieracium praealtum Villers ex Gochnatthen than of H. piloselloides Vill. or H. floribundum Wimm. & Grab. However, the Strother’s treatment in the Flora of North America (2006) does not include Hieracium praealtum Villers ex Gochnat, but does recognize it might merit taxonomic recognition.

Hieracium piloselloides has leaves (upper and lower surfaces) that are lack both hair types of long, stiff hairs (piloso-hirsute) and stellate (star-like) hairs (FNA 2006). Leaves are glabrous or have one long, stiff hairs on the midribs and margins.

Hiercium gracile is a native plant of the subalpine and alpine habitats. Its florets have 2 series of pappus bristles. Plants also tend to be less than 30 cm tall.

Range Comments
Introduced to northeast and northwest U.S. and adjacent Canada; native to Europe (Lesica et al. 2012).

Observations in Montana Natural Heritage Program Database
Number of Observations: 12

(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
Roadsides, grasslands; valleys, montane (Lesica et al. 2012).

Management

References
  • Literature Cited AboveLegend:   View Online Publication
    • Flora of North America Editorial Committee. 2006. Flora of North America North of Mexico. Vol. 19. Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford Univ. Press, New York. xxiv + 579 pp.
    • Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Web Search Engines for Articles on "Kingdevil Hawkweed"
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Citation for data on this website:
Kingdevil Hawkweed — Hieracium praealtum.  Montana Field Guide.  .  Retrieved on , from