curly dock
Rumex crispus L.


Rumex crispus is a perennial herb with erect flowering stems 11.8-63 in. (30-160 cm) in length.
Basal leaves up to 15.7 in. (40 cm) x 4.3 in. (11 cm), lanceolate or oblong-lanceolate in shape. Upper Cauline leaves are less crisped than basal leaves, with petioles up to 2.4 in. (6 cm) in length. Leaf margins of cauline leaves vary from nearly flat to strongly crisped.
Flowers are crowded in whorls which are usually distinct except towards the ends of branches. Perianth segments are orbicular-deltoid in shape are green colored at flowering but become brown.
The fruit is 0.14-0.24 in. (3.5-6 mm) x 0.12-0.24 in. (3-6 mm) and is enclosed within inner perianth segments. Margin of fruit is entire or minutely denticulate.
Ecological Threat
Rumex crispus is found in grasslands, pastures and arable land. It is native to Africa, temperate and tropical Asia and Europe.

Selected Images


EDDMapS Distribution

EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit

State Regulated List

State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit

State Regulated List
   No Data for this state
   Troublesome or Common weed in one or more crops

Most Troublesome / Most Common Agricultural Weed List
This map identifies those states that consider this species either most troublesome or most common in at least one commodity. For more information, visit the MTMC project page.

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Caryophyllidae
Order: Polygonales
Family: Polygonaceae
Genus: Rumex
Subject: Rumex crispus L.

Synonyms and Other Names

Other Common Names:
Curley dock, narrowleaf dock, sour dock, yellow dock


Plants - Forbs/Herbs