Hieracium aurantiacum orange hawkweed Asteraceae HIAU*; Bx, pb (DeCandido 2001); Q, j (Stalter and Lamont 2002); R (DeCandido 2001);

   

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Hieracium aurantiacum.nymf.bbg.org.Brooklyn Botanic Garden.New York Metropolitan Flora. (Accessed 4/2014).

Hieracium aurantiacum is a perennial herb, 10-60 cm tall, sap milky, stems from rhizomes, aggressively colonial from spreading basal stems (stolons), most parts long-hairy, hairs gland-tipped on upper stem. 

Leaves mostly in a basal rosette, 5-25 cm long, including stalk, 1-3.5 cm wide, narrow, widest above middle, tip blunt, base narrowing gradually to winged stalk, both sides long-hairy, green, margin entire, leaves of stolons smaller, stem leaves 1, (occasionally 2 or none), much smaller, sessile. 

Flowers red-orange, about 2 cm wide, all rays, basal bracts of head (involucre) with long blackish, gland-tipped hairs, self-fertile (agamospermy), (Mulligan and Kevan 1973); inflorescence of small, branched clusters at top of stem; blooms June-Aug. 

Fruit dry, 1-seeded achenes with whitish plume; wind dispersed. 

Wetland status: UPL. 

Frequency in NYC: Very infrequent. 

Origin: Europe. 

Habitat: Open areas, roadsides, lawns.