Photos and descriptions of Common groundsel ... DESCRIPTION: Common groundsel is a nearly ubiquitous winter or summer annual broadleaf, but can grow all year in coastal areas of California. Infestations are most troublesome during cool, moist periods. Cotyledons (seed leaves) are elongate, with a blunt, rounded tip.
www.ipm.ucdavis.edu/PMG/WEEDS/common_groundsel.html www.ipm.ucdavis.edu/PMG/WEEDS/common_groundsel.html
UC home and landscape guidelines for control of Common Groundsel PestNote. ... The success of common groundsel as a weed lies in its seeds. It starts developing seeds very early in its life cycle and can produce 25,000 or more seeds per plant under optimal conditions, although about 1,700 seeds per plant are more likely.
www.ipm.ucdavis.edu/PMG/PESTNOTES/pn74130.html
Senecio vulgaris - Wikipedia, the free encyclopedia
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Senecio vulgaris , often known by the common name Common groundsel , a humble in appearance member of the Asteraceae family and Senecio genus, is a tenacious deciduous annual whose presence now...
en.wikipedia.org/wiki/Senecio_vulgaris
Common Groundsel: Senecio vulgaris ... Weed Description: A winter or summer annual with lobed leaves, yellow leaves and a white 'puff-ball' seedhead ... Common groundsel is primarily a weed of landscapes, nursery crops, greenhouses, and occasionally agronomic crops. It is distributed primarily in the northern United States.
www.ppws.vt.edu/scott/weed_id/senvu.htm
Common groundsel, native to Europe, is now common throughout the temperate regions of the world. It is widespread in Oregon, Washington, and Idaho, but most common west of the Cascade Mountains. ... ; Figure 1.--Common groundsel grows from 4 to 18 inches tall. Leaves are deeply lobed with toothed margins. The lower stems...
extension.oregonstate.edu/catalog/html/pnw/pnw466/
Figure 1.--Common groundsel grows from 4 to 18 inches tall. Leaves are deeply lobed with toothed margins. The lower stems and undersides of basal leaves usually are purplish-colored. C A Pacific Northwest Extension Publication Oregon Idaho Washington symptoms until 2 or 3 days before death.
extension.oregonstate.edu/catalog/pdf/pnw/pnw466.pdf
Cultivation: Common Groundsel is often found in full or partial sun, mesic conditions, and fertile loamy soil. It blooms in as little as 5 weeks after the seeds germinate, and appears to favor cooler weather during the spring or fall.
www.illinoiswildflowers.info/weeds/plants/cm_groundsel.... www.illinoiswildflowers.info/weeds/plants/cm_groundsel.htm
Common groundsel is a winter or summer annual, but may act as a biennial. Plants have simple or branched upright growth, 6 to 18 inches tall. The foliage is generally smooth but may have light pubescence. Flowers are yellow.
mint.ippc.orst.edu/groundsel.htm mint.ippc.orst.edu/groundsel.htm
Common name: common groundsel; ... Notes: Common groundsel can often be seen infected with a rust fungus. ... Control: Evaluate 2003 container herbicide trials for this and other common weeds.
oregonstate.edu/dept/nursery-weeds/weedspeciespage/comm... oregonstate.edu/dept/nursery-weeds/weedspeciespage/common_groundsel/common_groundsel_page.html
Common groundsel is a problem weed in cultivated crops, gardens, and nurseries. It is poisonous to cattle and horses and toxic to humans. It contains pyrrolizidine alkaloids, which can cause irreversible liver damage and possibly death.
www.weedsbc.ca/weed_desc/com_ground.html