Flower Color

• Yellow

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

• Axillary racemes
• Terminal raceme

Number of Petals

• 4 petals

Petal Separation

• Completely free to base

Petal Tip

• Rounded

Flower Symmetry

• Flowers regular

Flower Length (Head length in the Asteraceae)

• 3 mm (.12 inch)
• 4 mm (.16 inch)
• 5 mm (.20 inch)

Flower Width (Head width in the Asteraceae)

• 5 mm (.20 inch)
• 6 mm (.24 inch)
• 7 mm (.28 inch)

Number of Sepals

• 4 sepals

Sepal Separation

• Completely free to base

Sepal Tip

• Pointed
• Rounded

Flower Sex

• Bisexual (perfect)

Number of Styles

• 1 style

Number of Stamens

• 6 stamens

Stamens Attached to the Petals

• Stamens NOT attached to the petals

Stamens Connate (united)

• Filaments or anthers NOT united

Leaf or Leaflet Blade Surface

• Two-rayed (dolabriform)
• Glabrous (NO hairs)
• Scabrous (like sand paper)
• Sparsely hairy
• Stellate (star shaped)

Leaf Arrangement

• Alternate

Leaf Type

• Simple (including lobed leaves)

Stipules

• Lacking

Tendrils

• Tendrils absent

Venation

• Pinnate

Petiole (leaf stem) Blade Ratio

• Petiole < 25% total length

Leaf Length (blade PLUS petiole)

• 2 - 4 cm (.80 - 1.60 inches)
• 4 - 10 cm (1.60 - 4.0 inches)

Leaf Width

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

Leaf Shape (simple leaves only)

• Linear or filiform
• Oblanceolate
• Ovate
• Pinnately lobed

Leaf or Leaflet Margin

• Entire
• Lobed
• Undulate (sinuate, repand)

Leaf or Leaflet Blade Base

• Acute (cuneate)
• Acuminate (attenuate)

Leaf or Leaflet Tip

• Acuminate (attenuate)
• Acute

Succulence

• Not succulent

Carpel Separation

• Carpels united (or one)

Number of Carpels

• 2 carpels

Ovary Position

• Superior (hypogynous)

Fruit Type

• Capsule, 2-celled

Fruit Length at Maturity

• 1.0 cm (.40 inch)
• 1.5 cm (.60 inch)
• 2.0 cm (.80 inch)
• 2.5 cm (1.0 inch)
• 3.0 cm (1.2 inches)

Fruit Width at Maturity

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

Burs

• Fruit or seed NOT bur-like

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)

• Erect, columnar (narrow)

Plant Height at Maturity

• 2 - 4 dm (8.0 - 16.0 inches)
• 4 - 6 dm (1.3 - 2.0 feet)
• 6 - 8 dm (2.0 - 2.6 feet)
• 8 - 10 dm (2.6 - 3.3 feet)

Wind Dissemination

• Not wind disseminated

Moisture Regime

• Mesic

Chlorophyll

• Present

Stem Cross Section

• Round

Flowering Stem Leaves

• Stem leaves greatly reduced

Main Stem Branches

• Main stem unbranched

Root or Vegetative Propagule

• Tap Root

US State

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

Canadian Province or Territory

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

Other

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

• Common Weeds of Canada, Mulligan 1987 (ISBN 0-910053-59-9) See page: 51
• Common Weeds of the Canadian Prairies, 1963 (Cat# A53-1136-1) See page: 37
• Common Weed Seedlings of the United States and Canada, 1978 Coop Ext. Univ. of Georgia, Athens, See page: 17
• Identification Guide to the Weeds of Quebec, 1999 (ISBN# 2-89457-174-7) See page: 104
• Nebraska Weeds, 1979 Nebraska Dept. of Ag., Lincoln NE, See page: 90
• Ontario Weeds, 1992 Agdex 640, Publication #505 See page: 98
• Some Important Michigan Weeds, 1951 Mich. Ag. Exp. Station Bulletin #304, See page: 113
• Weed Seeds of the Great Plains, 1993 University of Kansas# 92-125-B ISBN# 0-7006-0651-3 See index #: 74
• Weeds, 1955 (1980) Walter Conrad Muenscher, ISBN# 0-8014-1266-8 See page: 243, 246
• Weeds of Alberta, 1983 Alberta Environmental Centre Agdex 640-4, See page: 123
• Weeds of Canada, 1970 Canada Dept. of Ag., Pub. # 948, See page: 105
• Weeds of Nebraska and the Great Plains, 1994 (ISBN 0939870-00-4) See page: 208
• Weeds of Nova Scotia, 1986 (ISBN# 0-88871-063) See page: 90
• Weeds of the North Central States, 1981 Univ. of Illinois, Urbana - Champaign Bulletin # 772, See page: 95
• Weeds of the Northern United States and Canada, 1964 Montgomery See page: 75
• Weeds of the Northern U.S, and Canada, 1999 Royer and Dickinson, (ISBN# 1-55105-221-0) See page: 280 - 281
• Weeds of Utah, 1971 UAES Special Report 21, See page: 45
• Listed as a `Weed` by the Biota of North America Program, 2008 x
• Listed in the WSSA Composite List of Weeds X