Hieracium longipilum

Hieracium longipilum
1913 illustration[1]
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Genus: Hieracium
Species: H. longipilum
Binomial name
Hieracium longipilum
Torr. ex Hook. 1833

Hieracium longipilum, hairy hawkweed,[2] is a North American plant species in the dandelion tribe within the sunflower family. It is widespread across much of central Canada and the central United States from Ontario south to Texas and Louisiana. There are old reports of the species growing in Québec, but apparently does not grow there now.[3][4]

Hieracium longipilum is an herb up to 200 cm (79 in) or 6 2/3 feet) tall, with leaves in a rosette at the bottom and also along the stem. Leaves, stems, and the bracts surrounding the flower heads are covered with long and conspicuous hairs up to 15 mm (0.59 in) long. Leaves are up to 25 cm (9.8 in) long, with no teeth on the edges. One stalk will produce 10-12 flower heads in a conical or nearly cylindrical array. Each head has 30-60 yellow ray flowers but no disc flowers.[4]

References

  1. ↑ USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 3: 330.
  2. ↑ "Hieracium longipilum". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 23 July 2015.
  3. ↑ Biota of North America Program 2004 county distribution map
  4. 1 2 Flora of North America, Hieracium longipilum Torrey ex Hooker, 1833.
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