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Weed Identification

Australian water-clover

Family

Marsileaceae

Scientific Name

Marsilea mutica

Habit

Aquatic plant with"4-leaf clover" leaves floating at the surface from a trailing vine

Leaves

4 leaflets arranged radially, on the water surface. Obovate (oval, pointed towards the node) leaflets may have variegation

Identifying Characteristics

A feral ornamental, this aquatic plant may be quite attractive, resembling a shamrock or 4-leaf clover.

Flower Seed Head

Small flowers have 5 flower parts.

Where Found

In ponds throughout warm parts of North America. Introduced from Australia

Growth Habit

vine

Thorns or Spines

not present

Approximate Flower Diameter

Varies: 
pencil
dime

Dominant Flower Color

Varies: 
white
yellow

Flower Symmetry

radial symmetery

Leaf Hairs

no hairs

Leaf Shape

Varies: 
oval
triangle

Leaf Arrangement

whorled

Leaf Margin

entire

Leaf Structure

palmate

Leaf Stalk

longer than leaf

Stem Hairs

no hairs

Stem Cross Section

round or oval

Milky Sap

not present

Root Structure

Varies: 
fibrous
rhizomes present

Life Cycle

perennial

Ochrea

not present

Plant Type

Fern