Penstemon ambiguus

Species category

Herb or Spice, Shrub or Tree

Common name

gilia penstemon, bush penstemon, gilia beardtongue

Diagnostic characters

Planting unit

True seedTrue seed:
A mature fertilized ovule consisting of an embryo, with or without and external food reserve (e.g., endosperm) enclosed by the testa.

Shape

Irregularly rectangular

Size

  • Length 2–2.3 mm 
  • Width 1–1.1 mm 
  • Thickness 1–1.1 mm 

Color

Black with brown margins

Texture

Stippled

Other structures

Flat rough surface

Identification notes

Flat surfaces are joined by brown winged ridges.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Plantaginaceae

Valid name

Penstemon ambiguus Torr.

 Penstemon ambiguus.  True seeds with flat surfaces that are joined by brown winged ridges. 
Penstemon ambiguus. True seeds with flat surfaces that are joined by brown winged ridges.