Eriogonum umbellatum

Species category

Flower, Weed

Common name

sulphur-flower buckwheat

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

SpatulateSpatulate:
Having a narrow base and rounded apex. Pear-shaped.

Size

  • Length 3.5–4.5 mm
  • Width 1.2–1.8 mm
  • Thickness 1.2–1.8 mm

Color

Light brown

Texture

Moderately smooth with irregular indentations

Other structures

Often has calyx and corolla fragments attached.

Identification notes

Longitudinal ridges. Cross section is moderately triangular.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Polygonaceae

Valid name

Eriogonum umbellatum Torr.

 Eriogonum umbellatum.  Achenes often have the calyx and corolla fragments attached.
Eriogonum umbellatum. Achenes often have the calyx and corolla fragments attached.