NC State Extension Publications

Description

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Yellow woodsorrel (Oxalis stricta) is an herbaceous perennial common in greenhouse and turf situations. It is most recognizable due to the heart-shaped leaflets that are found three to a leaf. The plant has a shallow taproot, and hairy stems that are 4 to 10 inches tall. Flowers are bright yellow, have five petals, and bloom in early spring (March to April). The fruit is a narrow capsule 12 to 1 inch long. The supporting stalk bends just below the capsule.

Cultural Control

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Perennial broadleaf turf weeds are capable of living more than two years. They thrive in weak, thin turf; golf fairways and roughs; home lawns; playfields; and industrial grounds. Proper turf maintenance is the key to control of this weed. First, select adapted turfgrass cultivars for your area and then properly fertilize, mow, and water to encourage dense growth.

Species Data

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Yellow woodsorrel growth habit.

Figure 1. Yellow woodsorrel growth habit.

Yellow woodsorrel growth habit.

Figure 2. Yellow woodsorrel growth habit.

Yellow woodsorrel growth habit.

Figure 3. Yellow woodsorrel growth habit.

Yellow woodsorrel growth habit.

Figure 4. Yellow woodsorrel growth habit.

Yellow woodsorrel leaflet shape.

Figure 5. Yellow woodsorrel leaflet shape.

Yellow woodsorrel leaflet shape.

Figure 6. Yellow woodsorrel leaflet shape.

Yellow woodsorrel leaflet shape.

Figure 7. Yellow woodsorrel leaflet shape.

Yellow woodsorrel leaflet shape.

Figure 8. Yellow woodsorrel leaflet shape.

Yellow woodsorrel flower color.

Figure 9. Yellow woodsorrel flower color.

Yellow woodsorrel flower color.

Figure 10. Yellow woodsorrel flower color.

Yellow woodsorrel flower color.

Figure 11. Yellow woodsorrel flower color.

Yellow woodsorrel flower color.

Figure 12. Yellow woodsorrel flower color.

Yellow woodsorrel flower color.

Figure 13. Yellow woodsorrel flower color.

Author

Extension Specialist (Turfgrass/Forage Crop Weed Mgt)
Crop & Soil Sciences

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Publication date: Nov. 29, 2017

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