Rumex altissimus

Species category

Weed

Common name

pale dock, smooth dock

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

ObovateObovate:
Inverted egg shaped with apical end the broadest.
, triangular in cross section

Size

  • Length 1.8–2 mm
  • Width 1–1.2 mm
  • Thickness 1–1.2 mm

Color

Dark brown

Texture

Smooth

Other structures

Angles are acute and appear narrowly winged. Ridges do not recurve near the apexApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
and base.

Identification notes

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.
three-sided with the ridges where sides meet being sharp and slightly raised (winged). Ridges approach the apicalApical:
The distal end of the fruit or seed away from the point of attachment or attachment scar.
and basalBasal:
The base of the fruit or seed opposite the apical end.
ends in a straight line and usually do not recurve. Calyx with a wavy margin and central callositie.

Noxious weed seed categories

State Noxious Weed: Alabama, Arkansas, Connecticut, Georgia, Iowa, Kansas, Louisiana, Mississippi, Missouri, Nebraska, Oklahoma, South Carolina, Tennessee, Texas, Washington

AOSA examination list

Not included

More information

For more information, see ISMA fact sheet, Rumex spp.

Nomenclature

Family

Polygonaceae

Valid name

Rumex altissimus Alph. Wood

Synonyms

Rumex britannica Meisn., non L.
Rumex brittanicus
Meisn., orth. var.
Rumex ellipticus
Greene

 Rumex altissimus.  Achenes with ridges that approach the apical and basal ends in a straight line, and usually do not recurve.
Rumex altissimus. Achenes with ridges that approach the apical and basal ends in a straight line, and usually do not recurve.