Pycnanthemum pilosum

Species category

Weed

Common name

whorled mountainmint

Diagnostic characters

Planting unit

NutletNutlet:
A small, dry, indehiscent carpel of a fruit, usually composed of one quarter of the fruit with each enclosing a single seed (e.g. mints).

Shape

OvalOval:
Broadly elliptic.

Size

  • Length 1–1.5 mm
  • Width 0.5–0.7 mm
  • Thickness 0.4–0.6 mm

Color

Light brown

Texture

GranularGranular:
Resembling or consisting of small grains or particles.

Other structures

A large V-shaped attachment area at the base

Identification notes

NutletNutlet:
A small, dry, indehiscent carpel of a fruit, usually composed of one quarter of the fruit with each enclosing a single seed (e.g. mints).
with central longitudinal ridge on ventralVentral:
Adaxial; of the side of an organ facing the axis (compare dorsal).
side, extending from hilumHilum:
The scar on the seed coat at the place of its detachment from the seed stalk (funiculus).
to near the apexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Lamiaceae

Valid name

Pycnanthemum pilosum Nutt.

Synonyms

Koellia pilosa (Nutt.) Britton
Pycnanthemum pilosum
Nutt.

 Pycnanthemum pilosum.  Nutlets with a large V-shaped attachment area at the base. 
Pycnanthemum pilosum. Nutlets with a large V-shaped attachment area at the base.