Hieracium

Hieracium
Hieracium caespitosum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Subfamily:	Cichorioideae
Tribe:	Cichorieae
Subtribe:	Hieraciinae
Genus:	Hieracium L.
Synonyms
Chlorocrepis[1] Crepidopsis Arv.-Touv. Pilosella Vaill.[2]

Hieracium is the hawkweed. This genus of sunflowers has a huge number of species – over ten thousand species and subspecies.

Some experts split it up into two genera: what is here treated as the single genus Hieracium is treated by some European experts as two genera, Hieracium and Pilosella.

Like all members of the family, hawkweeds have tightly packed flowerheads made of many small flowers. They reproduce asexually by seeds which are genetically identical to those of the mother plant.^[3]

1. ↑ International Organization for Plant Information (IOPI). "Vascular plants of Russia and adjacent countries as of 26.10.96". Provisional Global Plant Checklist. International Organization for Plant Information (IOPI). Archived from the original on 2013-12-13. Retrieved 2007-12-17.
2. ↑ Germplasm Resources Information Network. "Genus: Hieracium L." (GRIN) Online Database. USDA, ARS, National Genetic Resources Program. Archived from the original on 2013-12-13. Retrieved 2007-12-23.
3. ↑ Edsall, Marion 2007 [1985]. Roadside Plants and Flowers: a traveler's guide to the Midwest and Great Lakes area. University of Wisconsin Press, p46. ISBN 0-299-09704-8. Dewey 582.0977. A dry roadside dotted with small, 3/4 inch red orange flowers, interspersed with very similar yellow ones, and often the white of daisies, is a good sign that you are in Hawkweed country.