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Oklahoma State University Stillwater, OK |
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Oklahoma Alfalfa |
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Oklahoma State University Stillwater, OK |
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Oklahoma Alfalfa |
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Plains Coreopsis |
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| COMMON NAME: | Plains Coreopsis |
| SCIENTIFIC NAME: | Coreopsis tinctoria Nutt. |
| TYPE: | Annual |
| DESCRIPTION | |
| Germination: | September-November. |
| Reproduction: | By seeds, July-August. |
| Stems: | The stems are erect, arising singly but much branched. |
| Leaves: | The leaves of plains coreopsis can be either opposite or alternating with blades that are either pinnate or bipinnate. The upper leaves may be undivided. They also may be short petiolate or subsessile. |
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Flowers/ Inflorescence: |
The flowers of the plains coreopsis are either sterile of fertile. The sterile ones have yellow ray color with a red spot at the base. The fertile flowers are numerous, reddish-brown in color. |
| Fruit: | The fruit is a one-seeded achene that is black, flattened, and wingless to broadly winged. The pappus is of minute awns or reduced to an obscure crown. |
FOUND: |
Plains coreopsis is found primarily in damp soil of disturbed sites, roadsides, cultivated fields, flood plains, pond banks, and waste places. Occasionally, it will come into thinning stands of alfalfa. |
CONTROL: |
January-February application of SINBAR and VELPAR not that effective on larger plants. |
| In Alfalfa |  Plant |
 Leaf |
 Plant |
 Flower |
| Additional Plains Coreopsis Images | ||||
| Jim Stritzke Former Alfalfa Weed Control Specialist Department of Plant and Soil Sciences Oklahoma State University |
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