Flower Color

• Yellow
• White
• Brown/Black

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

• Axillary cluster
• Head
• Solitary, axillary

Number of Petals

• 0 (no petals)
• 5 petals

Petal Separation

• United > 75% of length

Petal Tip

• Pointed

Flower Symmetry

• Flowers regular

Flower Length (Head length in the Asteraceae)

• 1 mm (.04 inch)
• 2 mm (.08 inch)
• 3 mm (.12 inch)
• 4 mm (.16 inch)

Flower Width (Head width in the Asteraceae)

• 1 mm (.04 inch)
• 2 mm (.08 inch)
• 3 mm (.12 inch)
• 4 mm (.16 inch)
• 5 mm (.20 inch)

Number of Sepals

• sepals lacking
• more than 10 sepals

Sepal Separation

• Completely free to base

Sepal Tip

• Pointed
• Rounded

Flower Sex

• Bisexual (perfect)

Number of Styles

• 1 style

Number of Stamens

• 5 stamens

Stamens Attached to the Petals

• Stamens attached to the petals

Stamens Connate (united)

• Anthers united, syngynoecious

Carpel Separation

• Carpels united (or one)

Number of Carpels

• 1 carpel

Ovary Position

• Inferior (epigynous)

Fruit Type

• Achene

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

• Alternate

Leaf Type

• Simple (including lobed leaves)

Stipules

• Lacking

Tendrils

• Tendrils absent

Venation

• Pinnate

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)

Leaf Shape (simple leaves only)

• Linear or filiform
• Oblanceolate

Leaf or Leaflet Margin

• Entire

Leaf or Leaflet Blade Base

• Acute (cuneate)
• Truncate

Leaf or Leaflet Tip

• Acute
• Rounded (obtuse)

Leaf or Leaflet Blade Surface

• Strigose
• Tomentose

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

Growth Habit (while flowering)

• Spreading ascending
• Erect, spherical (bushy)

Plant Height at Maturity

• 1 - 5 cm (.40 - 2.0 inches)
• 5 - 10 cm (2.0 - 4.0 inches)
• 1 - 2 dm (4.0 - 8.0 inches)

Wind Dissemination

• Fruit, seed, or spore wind borne

Moisture Regime

• Semi-aquatic
• Seasonally saturated

Chlorophyll

• Present

Stem Cross Section

• Round

Flowering Stem Leaves

• Stem uniformly leafy

Main Stem Branches

• Main stem branched

Root or Vegetative Propagule

• Tap Root

US State

• Connecticut
• Delaware
• Illinois
• Kentucky
• Massachusetts
• Maine
• Michigan
• New Hampshire
• New Jersey
• New York
• Ohio
• Pennsylvania
• Tennessee
• Virginia
• Wisconsin
• West Virginia
• Indiana
• Maryland
• Rhode Island
• Vermont
• Alaska
• Colorado
• Idaho
• Minnesota
• Montana
• North Dakota
• Oregon
• Utah
• Washington

Canadian Province or Territory

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

Other

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

• How to Know the Weeds, 1972, (ISBN# 0-697-04880-2) See page: 172
• Identification Guide to the Weeds of Quebec, 1999 (ISBN# 2-89457-174-7) See page: 52
• Ontario Weeds, 1992 Agdex 640, Publication #505 See page: 231
• Weeds, 1955 (1980) Walter Conrad Muenscher, ISBN# 0-8014-1266-8 See page: 467, 468
• Weeds of Nova Scotia, 1986 (ISBN# 0-88871-063) See page: 52
• Weeds of the Northeast, 1997 Cornell University ISBN# 0-8014-8334-4 See page: 120,144
• Weeds of the Northern U.S, and Canada, 1999 Royer and Dickinson, (ISBN# 1-55105-221-0) See page: 39
• Listed as a `Weed` by the Biota of North America Program, 2008 x
• Listed in the WSSA Composite List of Weeds X