rush skeletonweed
Chondrilla juncea L.


Chondrilla juncea is a perennial forb that can grow up to 4 ft. (1.2 m) tall.
Coarse-looking, multiple stems appear leafless due to inconspicuous leaves and arise from a basal rosette of sharply lobed leaves. The lower 4-6 in. (10.2-15.2 cm) of stem is covered with coarse brown hairs. Both stem and leaves produce a milky sap when broken.
Flowers are small and yellow and develop in the mid-summer to fall. Mature, healthy plants can produce 1,500 flower heads and up to 20,000 seeds. Flowers bloom from July to September.
Fruit is oblong, tapered at both ends, pale to dark brown, and 0.11-0.15 in. (3-4 mm) long. Seed production continues from July into November.
Ecological Threat
Chondrilla juncea invades dry rangelands in the Western U. S., displaces native species, and reduces forage for livestock and wildlife. It is native to Europe, Asia, and Africa and was accidentally introduced to the U. S. as a contaminant of fodder in 1914.


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

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Asteridae
Order: Asterales
Family: Asteraceae
Genus: Chondrilla
Subject: Chondrilla juncea L.

Synonyms and Other Names

Other Common Names:


Plants - Forbs/Herbs