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Weed Identification

creeping woodsorrel

Family

Oxalidaceae

Scientific Name

Oxalis corniculata

Other Common Names:

ihi
creeping oxalis
creeping woods
oxalis
yellow oxalis
yellow wood sorrel

Synonyms (former Scientific Names):

Oxalis repens
Oxalis langloisii
Xanthoxalis langloisii
Oxalis villosa
Acetosella corniculata
Xanthoxalis corniculata
Xanthoxalis repens
Oxalis pusilla

Habit

This erect perennial can be found flowering during most of the year. It may act as a summer annual in cooler climates.

Leaves

The alternate leaves are composed of three heart-shaped leaflets. They can range in color from green to purple. The leaf margins can be fringed with hairs.

Identifying Characteristics

When exposed to full sunlight, or drought conditions, the leaves will turn reddish and wilt. The stems are hairy and are usually green, but can be pink.

Flower Seed Head

The yellow flowers form in clusters on slender stalks. The flowers generally grow in clusters of 1-5 and have 5 petals.

Seed Fruit

Seeds come from angulated, cylindrical, hairy seedpods, resembling okra. The seedpods can grow from 1/3 to 1 inch in length. Each pod may contain from 10-50 seeds, and when ripe, will expel them with great force up to 13 feet away. Because of the rough surface of the seeds, they tend to adhere to surfaces they encounter.

Where Found

This plant can be found growing in shady areas or in full sunlight if there is enough moisture.

Growth Habit

prostrate and nonwoody

Thorns or Spines

not present

Approximate Flower Diameter

Varies: 
pencil
dime
nickle

Dominant Flower Color

yellow

Flower Symmetry

radial symmetery

Leaf Hairs

has hairs

Leaf Shape

heart

Leaf Arrangement

alternate

Leaf Margin

entire

Leaf Structure

trifoliate

Leaf Stalk

longer than leaf

Stem Hairs

has hairs

Stem Cross Section

round or oval

Milky Sap

not present

Root Structure

taproot

Life Cycle

perennial

Ochrea

not present

Plant Type

Herb