Oxeye daisy
Leucanthemum vulgare (formerly Chrysanthemum leucanthemum)
Keys to Identification
- Oxeye daisy can be identified by its daisy-like flowers
- Flowering heads are solitary at the ends of branches, have white ray flowers and yellow disk flowers and are about 2 in wide
This information courtesy of the Colorado Natural Areas Program
Family
Sunflower (Asteraceae)
Other Names
White daisy
USDA Code
CHLE80, LEVU
Legal Status
Colorado Noxious Weed List B
Identification
Lifecycle
Perennial, short-lived.
Growth form
Forb
Flower
Flowering heads are solitary at the ends of branches. Flowerheads have white ray flowers and yellow disk flowers.
Seeds/Fruit
Fruits have about 10 ribs.
Leaves
Alternately arranged leaves become progressively smaller upward along the stem. Basal and lower stem leaves are 2-5 in long, lance-shaped to narrowly egg-shaped. The upper leaves become stalkless and toothed.
Stems
Mature plants are 10-24 in tall with erect, smooth to sparsely hairy stems.
Roots
The plants have shallow, branched rhizomes.
Seedling
No information available.
Similar Species
Exotics
Oxeye daisy is easily confused with the ornamental Shasta daisy (Chrysanthemum maximum), which is a more robust plant with larger flowers.
Natives
None known.
Impacts
Agricultural
The plant is unpalatable to cattle; dense infestations can reduce cattle forage.
Ecological
Is capable of taking over and modifying natural areas, pasture and rangeland (Rutledge and McLendon, 1998), and may increase soil erosion compared to native plant communities (Olson and Wallander 1999).
Habitat and Distribution
General requirements
In Colorado, oxeye daisy is usually found at higher elevations in meadows, along roadsides, and in waste places. In many places this plant escaped from gardens and established in meadows, around mines and ghost towns in the mountains (Rutledge and McLendon, 1998).
Distribution
Widely distributed throughout the United States.
Historical
Escaped from cultivation as an ornamental.
Biology/Ecology
Life cycle
Basal rosettes must experience a period of cold temperatures.
Mode of reproduction
Oxeye daisy reproduces by seeds and short rootstocks.
Seed production
A typical plant produces over 500 seeds.
Seed bank
Seeds can remain viable in the soil for at least 2-3 years and sometimes far longer (Rutledge and McLendon, 1998).
References
Olson, B.E. and R.T. Wallander. 1999. Oxeye daisy. In R.L. Sheley and J.K. Petroff , eds. Biology and Management of Noxious Rangeland Weeds. Oregon State University Press, Corvallis, OR
Rutledge, C. R. and T. McLendon. No Year. An Assessment of Exotic Plant Species of Rocky Mountain National Park. Department of Rangeland Ecosystem Science, Colorado State University. 97pp. Northern Prairie Wildlife Research Center Home Page. http://www.npwrc.usgs.gov/resource/othrdata/Explant/explant.htm [Version 15 Dec 98].
Whitson, T.D.(ed.), L.C. Burrill, S.A. Dewey, D.W. Cudney, B.E. Nelson, R.D. Lee, R. Parker. 1996. Oxeye daisy. Weeds of the West. Western Society of Weed Science, in cooperation with the Western United States Land Grant Universities Cooperative Extension Services, Newark, CA.