Purshia tridentata

Species category

Revegetation or Rangeland, Shrub or Tree

Common name

antelope bitterbrush

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

ObovateObovate:
Inverted egg shaped with apical end the broadest.

Size

  • Length 5.5–7
  • Width 3–4 mm
  • Thickness 2.5–3.5 mm

Color

Gray with few small darker flecks

Texture

Smooth

Other structures

ApexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
is rounded, and the base is pointed.

Identification notes

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.
smooth and without attachments. BasalBasal:
The base of the fruit or seed opposite the apical end.
end pointed, apexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
round. If the 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.
loses its outer coat (pericarpPericarp:
Fruit wall; derived from the ovary wall.
), the enclosed seed is smooth.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Rosaceae

Valid name

Purshia tridentata (Pursh) DC.

Synonyms

Purshia tridentata (Pursh) DC. var. tridentata

 Purshia tridentata.  Achenes with a pointed basal end and a round apex.
Purshia tridentata. Achenes with a pointed basal end and a round apex.