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Penstemon grandiflorus

Species category

Flower, Weed

Common name

large beardtongue, largeflowered penstemon

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 triangular

Size

  • Length 2–3 mm
  • Width 1.5–2 mm
  • Thickness 1.2–1.5 mm

Color

Dark brown to medium brown

Texture

Stippled

Other structures

Some ridges are between the flat surfaces.

Identification notes

Some wavy shapes on flat surfaces.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Plantaginaceae

Valid name

Penstemon grandiflorus Nutt.

Synonyms

Penstemon bradburii Pursh

Penstemon grandiflorus. True seeds with some wavy shapes on the flat surfaces.
Penstemon grandiflorus. True seeds with some wavy shapes on the flat surfaces.
Penstemon grandiflorus. Dark to medium brown true seeds.
Penstemon grandiflorus. Dark to medium brown true seeds.