Croptilon hookerianum

Croptilon hookerianum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Croptilon
Species:	C. hookerianum
Binomial name
	Croptilon hookerianum; (Torr. & A.Gray) House
Synonyms
	Synonymy Croptilon divaricatum var. hookerianum (Torr. & A.Gray) Shinners ; Haplopappus divaricatus var. hookerianus (Torr. & A.Gray) Waterf. ; Haplopappus validus subsp. torreyi E.B.Sm. ; Isopappus hookerianus Torr. & A.Gray ; Croptilon divaricatum var. graniticum (E.B.Sm.) Shinners, syn of var. graniticum ; Haplopappus validus subsp. graniticus E.B.Sm., syn of var. graniticum ; Haplopappus validus (Rydb.) Cory, syn of var. validum ; Isopappus validus Rydb., syn of var. validum ;

Croptilon hookerianum, called Hooker's scratchdaisy, is a North American species of flowering plants in the tribe Astereae within the family Asteraceae. It has been found in the US states of Texas, Oklahoma, Kansas, and Arkansas.

Croptilon hookerianum is an herb sometimes reaching a height of 120 cm (4 feet). Flower heads are yellow, with both ray florets and disc florets.

Varieties

Croptilon hookerianum var. graniticum (E.B.Sm.) E.B.Sm. - Texas
Croptilon hookerianum var. hookerianum - Texas
Croptilon hookerianum var. validum (Rydb.) E.B.Sm. - Arkansas, Kansas, Oklahoma, Texas

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