Number of Petals

• 0 (no petals)

Number of Sepals

• sepals lacking

Number of Styles

• Styles lacking (male flowers only)

Number of Stamens

• stamens lacking (female flowers only)

Number of Carpels

• 0 (male flowers only or plants producing spores)

Fruit Length at Maturity

• 1 mm (.04 inch) or less

Fruit Width at Maturity

• 1 mm (.04 inch) or less

Burs

• Fruit or seed NOT bur-like

Fruit Type

• Spore

Leaf Arrangement

• Whorled 3 per node

Leaf Type

• Simple (including lobed leaves)

Stipules

• Lacking

Tendrils

• Tendrils absent

Petiole (leaf stem) Blade Ratio

• Petiole absent (leaf sessile)

Leaf Length (blade PLUS petiole)

• 5 - 10 mm (.20 - .40 inch)
• 1 - 2 cm (.40 - .80 inch)
• 2 - 4 cm (.80 - 1.60 inches)

Leaf Width

• 1 - 5 mm (.04 - .20 inch)
• 5 - 10 mm (.20 - .40 inch)
• 1 - 2 cm (.40 - .80 inch)

Leaf Shape (simple leaves only)

• Orbicular (round)

Leaf or Leaflet Margin

• Entire

Leaf or Leaflet Blade Base

• Cordate

Leaf or Leaflet Tip

• Rounded (obtuse)

Leaf or Leaflet Blade Surface

• Hirsute
• Hispid or setose

Succulence

• Not succulent

Milky Juice

• Juice NOT milky (watery)

Woodiness

• Herbaceous

Spines or Thorns

• Spines or Thorns ABSENT

Aromatic (vegetative structures)

• Not aromatic

Life Cycle

• Annual
• Perennial

Plant Height at Maturity

• < 1 cm (< .40 inch)

Wind Dissemination

• Fruit, seed, or spore wind borne
• Entire plant mobilized (tumbleweeds)

Moisture Regime

• Aquatic

Chlorophyll

• Present

Growth Habit (while flowering)

• Floating

Root or Vegetative Propagule

• Fibrous

US State

• Alabama
• Arkansas
• Florida
• Georgia
• Louisiana
• Massachusetts
• Mississippi
• New York
• South Carolina
• Texas
• Maryland
• New Mexico
• Oklahoma

Other

• Puerto Rico

• Aquatic and Riparian Plants of the West, 2003 (ISBN# 1-879906-59-7) See page: 60
• Weeds of the United States and Their Control, Lorenzi 1987, ISBN# 0-442-25884-4 See page: 35
• Listed as a `Weed` by the Biota of North America Program, 2008 x
• Listed in the WSSA Composite List of Weeds X