Gutierrezia sarothrae

Species category

Weed

Common name

broom snakeweed, broomweed, perennial snakeweed, stinkweed, turpentine weed, yellow top

Diagnostic characters

Planting unit

AcheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.

Shape

Conical

Size

  • Length 1.8–2 mm 
  • Width 0.5–0.8 mm 
  • Thickness 0.5–0.8 mm 

Color

Light brown

Texture

Surface covered with appressedAppressed:
Pressed close or lying flat against something.
coarse hairs.

Other structures

Translucent and triangular pappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
present.

Identification notes

PappusPappus:
Modified calyx in Asteraceae, composed of hairs, bristles, awns, or scales. The pappus-like structure attached to milkweed seeds is termed a coma. 
of various lengths.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Asteraceae

Valid name

Gutierrezia sarothrae (Pursh) Britton & Rusby

Synonyms

Gutierrezia diversifolia Greene
Gutierrezia lepidota Greene
Gutierrezia linearifolia Lag.
Gutierrezia linearis Rydb.
Gutierrezia linoides Greene
Gutierrezia longipappa S.F. Blake
Gutierrezia pomariensis (S.L. Welsh) S.L. Welsh Gutierrezia sarothrae (Pursh) Britton & Rusby var. pomariensis S.L. Welsh
Gutierrezia tenuis Greene
Solidago sarothrae Pursh
Xanthocephalum sarothrae (Pursh) Shinners Xanthocephalum sarothrae (Pursh) Shinners var. pomariense (S.L. Welsh) S.L. Welsh Xanthocephalum tenue (Greene) Shinners

 Gutierrezia sarothrae.  Achenes with a translucent and triangular pappus.
Gutierrezia sarothrae. Achenes with a translucent and triangular pappus.