Flower Color

• Yellow-green
• Green

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

• Terminal spike

Number of Petals

• 0 (no petals)

Flower Symmetry

• Flowers regular

Flower Length (Head length in the Asteraceae)

• < 1 mm (< .04 inch)
• 1 mm (.04 inch)
• 2 mm (.08 inch)
• 3 mm (.12 inch)

Flower Width (Head width in the Asteraceae)

• < 1 mm (< .04 inch)
• 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)
• 2 stamens
• 3 stamens
• 4 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

• Inferior (epigynous)

Fruit Type

• Achene

Fruit Length at Maturity

• 1 mm (.04 inch) or less
• 2 mm (.08 inch)
• 3 mm (.12 inch)
• 4 mm (.16 inch)
• 5 mm (.20 inch)
• 6 mm (.24 inch)
• 7 mm (.28 inch)
• 8 mm (.32 inch)

Fruit Width at Maturity

• 1 mm (.04 inch) or less

Burs

• Fruit or seed NOT bur-like

Leaf Arrangement

• All basal
• Alternate

Leaf Type

• Simple (including lobed leaves)

Stipules

• Lacking

Tendrils

• Tendrils absent

Venation

• Parallel

Petiole (leaf stem) Blade Ratio

• Petiole absent (leaf sessile)

Leaf Length (blade PLUS petiole)

• 4 - 6 dm (1.3 - 2.0 feet)
• > 6 dm (> 2.0 feet)

Leaf Width

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

Leaf Shape (simple leaves only)

• Linear or filiform

Leaf or Leaflet Margin

• Entire

Leaf or Leaflet Blade Base

• Clasping
• Truncate

Leaf or Leaflet Tip

• Acute
• 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

• Perennial

Growth Habit (while flowering)

• Erect, columnar (narrow)

Plant Height at Maturity

• 6 - 8 dm (2.0 - 2.6 feet)
• 8 - 10 dm (2.6 - 3.3 feet)
• 1 - 1.5 meters (3.3 - 5.0 feet)

Wind Dissemination

• Fruit, seed, or spore wind borne

Moisture Regime

• Aquatic
• Semi-aquatic

Chlorophyll

• Present

Stem Cross Section

• Round

Flowering Stem Leaves

• Stem leafless
• Stem leaves greatly reduced

Main Stem Branches

• Main stem unbranched

Root or Vegetative Propagule

• Fibrous
• Rhizomatous

US State

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

Canadian Province or Territory

• British Columbia
• New Brunswick
• Nova Scotia
• Ontario
• Prince Edward Island
• Quebec
• Alberta
• Manitoba
• Saskatchewan

Other

• District of Columbia

• Aquatic and Riparian Plants of the West, 2003 (ISBN# 1-879906-59-7) See page: 384
• The Biology of Canadian Weeds: Canadian Journal of Plant Science Vol:66Pg.361
• Common Weeds of the United States, 1971 (ISBN 0-486-20504-5) See page: 10
• How to Know the Weeds, 1972, (ISBN# 0-697-04880-2) See page: 14
• Weeds, A Golden Guide, 1972 ISBN#0-307-24353-2 See page: 11
• Weeds of California, 1970, State of California Publications and Documents. See page: 36
• Weeds of Nebraska and the Great Plains, 1994 (ISBN 0939870-00-4) See page: 531
• Weeds of the Midwestern United States & Central Canada, University of Georgia 2010, ISBN#0-8203-3506-1 See page: 387
• Weeds of the Northern U.S, and Canada, 1999 Royer and Dickinson, (ISBN# 1-55105-221-0) See page: 111
• Wildly Successful Plants, A Handbook of North American Weeds, 1977 (ISBN# 0-02-528850-4) See page: 20, 69
• Listed as a `Weed` by the Biota of North America Program, 2008 x
• Listed in the WSSA Composite List of Weeds X