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.
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.Kingdevil Hawkweed
) 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. Meadow Hawkweed
) 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. Tall Hawkweed
) 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. Alpine Hawkweed
)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.
Roadsides, grasslands; valleys, montane (Lesica et al. 2012).
The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus ternarius
, Bombus terricola
, Bombus bohemicus
, and Bombus flavidus
(Heinrich 1976, Colla and Dumesh 2010).