Hieracium longipilum, the hairy hawkweed,[2] is a North American plant species in the tribe Cichorieae within the family Asteraceae. 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 | |
|---|---|
| |
| 1913 illustration[1] | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Hieracium |
| Species: | H. longipilum
|
| Binomial name | |
| Hieracium longipilum | |
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
edit- ^ USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 3: 330.
- ^ NRCS. "Hieracium longipilum". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 23 July 2015.
- ^ Biota of North America Program 2004 county distribution map
- ^ a b Flora of North America, Hieracium longipilum Torrey ex Hooker, 1833.
External links
edit- Photo of herbarium specimen at Missouri Botanical Garden, collected in Missouri in 1993
- Photo by Gerrit Davidse, closeup showing hairs on leaves and stems
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