Calendula sp.

Species category

Flower

Common name

marigold

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

Extreme curve, scorpioid

Size

  • Length: 3–7 mm
  • Width: 3–7 mm
  • Thickness: 1–2.5 mm

Color

Brown

Texture

Outside: coarse reticulationReticulated:
Resembling a net or network, especially having veins, fibers, or lines crossing the surface.  

Inside: scurfyScurf:
Having flakes on the surface.

Other structures

Base is recurved.

Identification notes

Raised hump at both ends of the curved inner surface.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Asteraceae

Valid name

Calendula L.

 Calendula  sp. Achenes with a recurved base.
Calendula sp. Achenes with a recurved base.