Flower Color

• Green

Inflorescence Type (How the flowers are arranged on the plant)

• Axillary cluster

Number of Petals

• 0 (no petals)

Flower Symmetry

• Flowers regular

Flower Length (Head length in the Asteraceae)

• < 1 mm (< .04 inch)

Flower Width (Head width in the Asteraceae)

• < 1 mm (< .04 inch)

Number of Sepals

• sepals lacking

Flower Sex

• Unisexual (monoecious or dioecious)

Number of Styles

• Styles lacking (male flowers only)
• 1 style

Number of Stamens

• stamens lacking (female flowers only)
• 1 stamen
• 2 stamens

Stamens Attached to the Petals

• Stamens NOT attached to the petals

Stamens Connate (united)

• Filaments or anthers NOT united

Carpel Separation

• Carpels united (or one)

Number of Carpels

• 0 (male flowers only or plants producing spores)
• 1 carpel

Ovary Position

• Superior (hypogynous)

Fruit Type

• Utricle

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

Leaf Arrangement

• All basal
• Opposite
• Fascicled

Leaf Type

• Simple (including lobed leaves)

Stipules

• Lacking

Tendrils

• Tendrils absent

Venation

• Arcuate

Petiole (leaf stem) Blade Ratio

• Petiole absent (leaf sessile)

Leaf Length (blade PLUS petiole)

• < 5 mm (< .20 inch)

Leaf Width

• < 1 mm (< .04 inch)

Leaf Shape (simple leaves only)

• Obovate
• Orbicular (round)
• Oval
• Ovate

Leaf or Leaflet Margin

• Entire

Leaf or Leaflet Blade Base

• Rounded

Leaf or Leaflet Tip

• Rounded (obtuse)

Leaf or Leaflet Blade Surface

• Glabrous (NO hairs)

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

Plant Height at Maturity

• < 1 cm (< .40 inch)

Wind Dissemination

• Not wind disseminated

Moisture Regime

• Aquatic

Chlorophyll

• Present

Growth Habit (while flowering)

• Floating

Root or Vegetative Propagule

• Fibrous

US State

• Alabama
• Arkansas
• Connecticut
• Delaware
• Florida
• Georgia
• Illinois
• Kansas
• Kentucky
• Louisiana
• Massachusetts
• Maine
• Michigan
• Missouri
• Mississippi
• North Carolina
• New Hampshire
• New Jersey
• New York
• Ohio
• Pennsylvania
• Tennessee
• Texas
• Virginia
• Wisconsin
• West Virginia
• Indiana
• Maryland
• Rhode Island
• Vermont
• Alaska
• Arizona
• California
• Colorado
• Iowa
• Idaho
• Minnesota
• Montana
• North Dakota
• New Mexico
• Nevada
• Oklahoma
• Oregon
• South Dakota
• Utah
• Washington
• Wyoming
• Nebraska

Canadian Province or Territory

• British Columbia
• New Brunswick
• Ontario
• Prince Edward Island
• Quebec
• Alberta
• Manitoba
• Newfoundland
• Saskatchewan
• Yukon
• Nunavut
• Northwest Territory

Other

• District of Columbia
• St. Pierre and Miquelon
• Labrador

• Aquatic and Riparian Plants of the West, 2003 (ISBN# 1-879906-59-7) See page: 49
• Weeds of the Midwestern United States & Central Canada, University of Georgia 2010, ISBN#0-8203-3506-1 See page: 326
• Weeds of the Northern U.S, and Canada, 1999 Royer and Dickinson, (ISBN# 1-55105-221-0) See page: 127
• Weeds of the United States and Their Control, Lorenzi 1987, ISBN# 0-442-25884-4 See page: 88
• Listed as a `Weed` by the Biota of North America Program, 2008 x
• Listed in the WSSA Composite List of Weeds X