Rush Skeletonweed (Chondrilla juncea)

 
 
Download 231K pdf file ("rush_skeletonweed.pdf")PDF
(231K)
     Subscribe to our free E-Newsletter, "Agri-News" (formerly RTW This Week)Agri-News
This Week
 
 
 
  Return to the Weed Information Home Page
.
Description
A tap-rooted perennial reproducing primarily by seed but also by shoot buds produced on lateral roots.
Grows to 1.2 m tall. Lower 15 cm of stem covered with stiff, downward pointing, brown hairs, and remainder of stem hairless. Much branched wiry stems contain a white, milky juice. Bottom leaves form a rosette and look similar to dandelion. These leaves are to 3 cm wide and to 13 cm long.

Stem leaves arising from the branch axils are small, narrow and linear (sometimes toothed). These leaves are generally inconspicuous from a distance, giving the appearance of a "skeleton-like" plant. Flowers are yellow, about 2 cm in diameter, composed of 7 to 15 individual florets. Many flowers per plant, an average of 1500 are produced per plant. Flower heads are produced individually or in groups of two to five along or at the ends of the stems.

Key Identifiers
  • Downward bent, reddish, brown coarse hairs on the lower 15 cm of the stem
  • A skeletal look of the plant due to the lack of leaves on the upper part of the plant.
  • Many branches, many flowers
Location in Canada
In Canada, Rush Skeletonweed has been reported in British Columbia and Ontario. Alberta has no known reports.

Resources

Steve Dewey, Utah State University, Bugwood.org

Gary L. Piper, Washington State University, Bugwood.org
Similar species
Dandelion (Taraxacum officinale) Dandelion share a lot of characteristics in common with rush skeletonweed (leaves without hairs, leaf lobes pointing backward and opposite one another, milky juice exuded when torn). However, dandelion has un-branched, leafless, hollow, non-persistent, fleshy flowering stems and seeds without small scales at the apex.
Chicory (Cichorium intybus) is similar to rush skeletonweed and dandelion, but has rosette leaf lobes pointing outwards or forwards and not always opposite and basal leaves with a few rough coarse hairs.
 
 
 
 

Other Documents in the Series

 
  Bighead Knapweed (Centaurea macrocephala)
Black Knapweed (Centaurea nigra)
Brown Knapweed (Centaurea jacea)
Common Crupina (Crupina vulgaris)
Common St John's-wort (Hypericum perfoatum)
Diffuse Knapweed (Centaurea diffusa)
Dyer's Woad (Isatis tinctoria)
Garlic Mustard (Alliaria petiolata)
Giant Hogweed (Heracleum mantegazzianum)
Giant Knotweed (Fallopia sachalinensis)
Hoary Alyssum (Berteroa incana)
Hybrid Japanese Knotweed (Fallopia x bohemica)
Hybrid Knapweed (Centaurea x psammogena)
Japanese Knotweed (Fallopia japonica)
Marsh Thistle (Cirsium palustre)
Meadow Hawkweed (Hieracium caespitosum)
Meadow Knapweed (Centaurea x moncktonii)
Mouse-ear Hawkweed (Hieracium pilosella)
Nodding Thistle (Carduus nutans)
Plumeless Thistle (Carduus acanthoides)
Puncturevine (Tribulus terrestris)
Red Bartsia (Odontites vernus)
Rush Skeletonweed (Chondrilla juncea) - Current Document
Russian Knapweed (Rhaponticum repens)
Saltlover (Halogeton glomeratus)
Spotted Knapweed (Centaurea stobe ssp. micranthos)
Squarrose Knapweed (Centaurea virgata ssp. squarrosa)
Sulphur Cinquefoil (Potentilla recta)
Tansy Ragwort (Jacobaea vulgaris/Senecio jacobaea)
Tyrol Knapweed (Centaurea nigrescens)
Yellow Starthistle (Centaurea solstitialis)
 
 
 
 
Share via AddThis.com
For more information about the content of this document, contact Nicole Kimmel.
This document is maintained by Shelley Barkley.
This information published to the web on April 10, 2012.
Last Reviewed/Revised on March 21, 2014.