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Dracocephalum parviflorum

Species category

Weed

Common name

American dragonhead

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

OvalOval:
Broadly elliptic.
 with two flat sides

Size

  • Length 2.5–3 mm
  • Width 1.3–1.6 mm
  • Thickness 1–1.2 mm

Color

Black or dark brown

Texture

GranularGranular:
Resembling or consisting of small grains or particles.

Other structures

Seed scar at the base is white and V-shaped.

Identification notes

ChalazaChalaza:
End of seed opposite the micropyle.
 at the apicalApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
 end is connected to the seed scar by a line (rapheRaphe:
A seam or ridge found on seeds.
).

Noxious weed seed categories

Not listed

AOSA examination list

Included

Nomenclature

Family

Lamiaceae

Valid name

Dracocephalum parviflorum Nutt.

Synonyms

Moldavica parviflora (Nutt.) Britton

From Left to Right: 1. Salvia azurea var. grandiflora 2. Dracocephalum parviflora 3. Salvia reflexa 4. Nepeta cataria 5. Monarda punctata 6. Mentha arvensis . Seeds with a white V-shaped scar at the base.
From Left to Right: 1. Salvia azurea var. grandiflora 2. Dracocephalum parviflora 3. Salvia reflexa 4. Nepeta cataria 5. Monarda punctata 6. Mentha arvensis. Seeds with a white V-shaped scar at the base.
Dracocephalum parviflorum. Seeds with a white, V-shaped scar at the base.
Dracocephalum parviflorum. Seeds with a white, V-shaped scar at the base.