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Sourgrass Oxalis stricta

Other plants called Sourgrass:

Phonetic Spelling
oks-AL-iss STRIK-tuh
This plant has low severity poison characteristics.
See below
Description

Common yellow woodsorrel is in the Oxalidaceae family.  It is considered a weed in many turf and garden areas.  It grows best in spring or fall in warmer climates but plants will be present year-round. These plants are perennial, spreading by rhizomes and stolon, as well as by seeds. Seeds are forcefully expelled up to 16 feet away out of cylindrical seed pods, much like Impatiens.  Seeds have no dormancy and may germinate quickly. Flowers are bright yellow. Identifying characteristics include heart-shaped leaflets on trifoliolate leaves and cylindrical seed pods. Leaves resemble those of clover, but woodsorrel is not in the legume family.  The leaves curl up at night and open in the morning to photosynthesize.  It prefers, dry to moist well-drained sandy-loam, alkaline soils.  It can grow in nutritionally poor soil. 

The leaves, stems, flowers, and seed pods are edible and have a tangy, lemon-like flavor.  As it has oxalic acid, only eat sparingly.

Insects and Diseases: Plants harbor whitefly and mites. 

Management of Oxalis stricta:  Sanitation is critical in controlling woodsorrel in container plants, especially in propagation areas. Do not let plants go to seed. Inspect all new plant materials before planting for infestations of this weed. Woodsorrel from seed is well managed by most preemergence herbicides. Once established it is nearly impossible to completely remove woodsorrel rhizomes and stolons. 

Regions: woodlands, meadows, disturbed areas

 

VIDEO Created by Homegrown featuring Travis Birdsell, County Extension Director and Extension Agent for Ashe County Extension

More information on Oxalis.

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Cultivars / Varieties:
Tags:
#sun#full sun#partial shade#edible plant#weed#edible weed#weedy#meadow#NC native#woodland#disturbed areas#cool season weed#poor soils tolerant#edible#native weed#problem for cats#problem for dogs#problem for horses
 
Cultivars / Varieties:
Tags:
#sun#full sun#partial shade#edible plant#weed#edible weed#weedy#meadow#NC native#woodland#disturbed areas#cool season weed#poor soils tolerant#edible#native weed#problem for cats#problem for dogs#problem for horses
  • Attributes:
    Genus:
    Oxalis
    Species:
    stricta
    Family:
    Oxalidaceae
    Life Cycle:
    Perennial
    Recommended Propagation Strategy:
    Seed
    Country Or Region Of Origin:
    North America, Eurasia
    Edibility:
    Leaves, stems, flowers, and seed pods are edible and have a sour, tangy flavor. Use sparingly due to oxalic acid content.
  • Whole Plant Traits:
    Plant Type:
    Annual
    Edible
    Native Plant
    Perennial
    Weed
    Wildflower
    Growth Rate:
    Rapid
    Maintenance:
    High
  • Cultural Conditions:
    Light:
    Full sun (6 or more hours of direct sunlight a day)
    Partial Shade (Direct sunlight only part of the day, 2-6 hours)
    Soil Texture:
    Loam (Silt)
    Sand
    Soil pH:
    Alkaline (>8.0)
    Soil Drainage:
    Good Drainage
    Occasionally Dry
  • Fruit:
    Fruit Description:
    Cylindrical seed pods
  • Flowers:
    Flower Color:
    Gold/Yellow
    Flower Description:
    Bright yellow
  • Leaves:
    Leaf Color:
    Green
    Leaf Type:
    Compound (Pinnately , Bipinnately, Palmately)
    Leaf Shape:
    Cordate
    Leaf Margin:
    Entire
    Hairs Present:
    No
    Leaf Description:
    Heart-shaped trifoliate leaflets
  • Stem:
    Stem Is Aromatic:
    No
  • Landscape:
    Resistance To Challenges:
    Poor Soil
    Problems:
    Problem for Cats
    Problem for Dogs
    Problem for Horses
    Weedy
  • Poisonous to Humans:
    Poison Severity:
    Low
    Poison Symptoms:
    All parts of the plant have toxic potential, although the possibility of serious effects is usually limited to ingestions of large quantities. Consuming Oxalis species can produce colic in horses, and kidney failure is possible if significant amounts are eaten.
    Poison Toxic Principle:
    Soluble calcium oxylates
    Causes Contact Dermatitis:
    No