Verbena bonariensis

Species category

Weed

Common name

purpletop vervain, pretty verbena, purpletop vervain

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

Oblong

Size

  • Length 1.4–1.6 mm 
  • Width 0.4–0.6 mm 
  • Thickness 0.3–0.4 mm 

Color

DorsalDorsal:
Upper side or back of a seed or fruit.
-brown VentralVentral:
Adaxial; of the side of an organ facing the axis (compare dorsal).
- white

Texture

DorsalDorsal:
Upper side or back of a seed or fruit.
: rough.

VentralVentral:
Adaxial; of the side of an organ facing the axis (compare dorsal).
: tuberculateTuberculate:
Having small pimple-like protuberances.
.

Other structures

The dorsalDorsal:
Upper side or back of a seed or fruit.
side has approximately three longitudinal ribs.

Identification notes

The ventralVentral:
Adaxial; of the side of an organ facing the axis (compare dorsal).
side has two flat surfaces that are slightly oblique to each other, forming a longitudinal ridge between them.

Noxious weed seed categories

Not listed

AOSA examination list

Not included

Nomenclature

Family

Verbenaceae

Valid name

Verbena bonariensis L.

Synonyms

Verbena bonariensis L. var. bonariensis 
Verbena bonariensis L. var. conglomerata Briq.

 Verbena bonariensis.  Nutlets where the dorsal side has approximately three longitudinal ribs. 
Verbena bonariensis. Nutlets where the dorsal side has approximately three longitudinal ribs. 
 Verbena bonariensis.  Nutlets where the dorsal side has approximately three longitudinal ribs. 
Verbena bonariensis. Nutlets where the dorsal side has approximately three longitudinal ribs.