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Penstemon angustifolius

Species category

Flower, Weed

Common name

broadbeard beardtongue, narrowleaf 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

Triangular

Size

  • Length 2–2.5 mm
  • Width 1.8–2.8 mm
  • Thickness 0.6–0.8 mm

Color

Black or brown

Texture

Stippled

Other structures

Ridge is between flat surfaces.

Identification notes

Cross section is wedge-shaped.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Plantaginaceae

Valid name

Penstemon angustifolius Nutt. ex Pursh

Penstemon angustifolius. True seeds with a ridge between the flat surfaces.
Penstemon angustifolius. True seeds with a ridge between the flat surfaces.
Penstemon angustifolius. True seeds with a wedged cross-section.
Penstemon angustifolius. True seeds with a wedged cross-section.