What is Hieracium?
{{italictitle}} {{Automatic taxobox |image = Yellow Hawkweed.jpg |image_caption = ''Hieracium caespitosum'' |display_parents = 3 |taxon = Hieracium |authority = [[Carl Linnaeus|L.]] |synonyms = *''Chlorocrepis''<ref name='IOPI-1'>{{cite web |url = http://www.bgbm.org/IOPI/GPC/PTaxonDetail.asp?PTRefFk=&NameCache=Hieracium#1 |title = Vascular plants of Russia and adjacent countries as of 26.10.96 |access-date = 2007-12-17 |author = International Organization for Plant Information (IOPI) |work = Provisional Global Plant Checklist |publisher = International Organization for Plant Information (IOPI) |url-status = dead |archive-url = https://web.archive.org/web/20131213223601/http://www.bgbm.org/IOPI/GPC/PTaxonDetail.asp?PTRefFk=&NameCache=Hieracium#1 |archive-date = 2013-12-13 }} </ref> *''Crepidopsis'' <small>Arv.-Touv.</small> *''Pilosella'' <small> Vaill.</small><ref name='ARS'>{{cite web | url = http://www.ars-grin.gov/cgi-bin/npgs/html/genus.pl?5670 | title = Genus: ''Hieracium'' L. | access-date = 2007-12-23 | author = Germplasm Resources Information Network | work = (GRIN) Online Database | publisher = USDA, ARS, National Genetic Resources Program | archive-url = https://web.archive.org/web/20131213222733/http://www.ars-grin.gov/cgi-bin/npgs/html/genus.pl?5670 | archive-date = 2013-12-13 | url-status = dead }}</ref> }} '''''Hieracium''''' is the '''hawkweed'''. This [[genus]] of [[sunflower]]s has a huge number of [[species]] {{ndash}} 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 [[asexual]]ly by seeds which are [[genetically]] identical to those of the mother plant.<ref>Edsall, Marion 2007 [1985]. Roadside Plants and Flowers: a traveler's guide to the Midwes