Sonchus bulbosus
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Tribe:	Cichorieae
Subtribe:	Hyoseridinae
Genus:	Sonchus
Species:	S. bulbosus
Binomial name
Sonchus bulbosus (L.) N.Kilian & Greuter
Subspecies[1]
Sonchus bulbosus subsp. bulbosus Sonchus bulbosus subsp. microcephalus (Rech.f.) N.Kilian & Greuter Sonchus bulbosus subsp. willkomii (Burnat & Barbey) N.Kilian & Greuter
Synonyms[1][2]
Aetheorhiza bulbosa (L.) Cass. Crepis bulbosa (L.) Tausch Hieracioides bulbosa (L.) Kuntze Hieracium bulbosum (L.) Willd. Hieracium stoloniferum Viv. Hieracium tuberosum Brot. Intybus bulbosus (L.) Fr. Leontodon bulbosus L. (1753) (basionym) Prenanthes bulbosa (L.) DC. Taraxacum bulbosum (L.) Rchb. Troximon bulbosum (L.) Raf.

Sonchus bulbosus, the tuberous hawk's-beard,^[3] is a species of flowering plant in the family Asteraceae. It is a tuberous geophyte native to the Mediterranean basin countries of southern Europe, Western Asia, and North Africa, as well as the Azores (Terceira) and Ireland.^[1]

Three subspecies are accepted.^[1]

• Sonchus bulbosus subsp. bulbosus (synonyms Hieracium stoloniferum Viv. and H. tuberosum Brot.) – Mediterranean basin, Azores (Terceira), and Ireland
• Sonchus bulbosus subsp. microcephalus (Rech.f.) N.Kilian & Greuter – Greece, Turkey, Cyprus, Lebanon, and Syria
• Sonchus bulbosus subsp. willkomii (Burnat & Barbey) N.Kilian & Greuter – Balearic Islands