Flower Color

• Yellow
• Purple
• White
• Multi-colored

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
• Square

Flower Symmetry

• Flowers regular

Flower Length (Head length in the Asteraceae)

• 1.5 cm (.6 inch)
• 2.0 cm (.8 inch)

Flower Width (Head width in the Asteraceae)

• 2.0 cm (.80 inch)
• 2.5 cm (1.0 inch)
• 3.0 cm (1.2 inches)
• 3.5 cm (1.4 inches)
• 4.0 cm (1.6 inches)

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

Carpel Separation

• Carpels united (or one)

Number of Carpels

• 2 carpels

Ovary Position

• Superior (hypogynous)

Fruit Type

• Capsule, 2-celled

Fruit Length at Maturity

• 4.0 cm (1.6 inches)
• 4.5 cm (1.8 inches)
• 5.0 cm (2.0 inches)
• 6.0 cm (2.4 inches)

Fruit Width at Maturity

• 3 mm (.12 inch)
• 4 mm (.16 inch)
• 5 mm (.20 inch)
• 6 mm (.24 inch)

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)
• Petiole < 25% total length

Leaf Length (blade PLUS petiole)

• 4 - 10 cm (1.60 - 4.0 inches)
• 1 - 2 dm (4.0 - 8.0 inches)

Leaf Width

• 2 - 4 cm (.80 - 1.6 inches)
• 4 - 10 cm (1.6 - 4.0 inches)

Leaf Shape (simple leaves only)

• Lyrate
• Pinnately lobed

Leaf or Leaflet Margin

• Dentate
• Lobed
• Parted
• Serrate

Leaf or Leaflet Blade Base

• Acute (cuneate)
• Acuminate (attenuate)

Leaf or Leaflet Tip

• Acute
• Rounded (obtuse)

Leaf or Leaflet Blade Surface

• Hirsute
• Hispid or setose
• Pubescent

Succulence

• Not succulent

Milky Juice

• Juice NOT milky (watery)

Woodiness

• Herbaceous

Spines or Thorns

• Spines or Thorns ABSENT

Aromatic (vegetative structures)

• Not aromatic
• Aromatic

Life Cycle

• Annual
• Biennial

Growth Habit (while flowering)

• Erect, columnar (narrow)
• Erect, spherical (bushy)

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 branched

Root or Vegetative Propagule

• Tap Root

US State

• Alabama
• Connecticut
• Delaware
• Florida
• Georgia
• 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
• Hawaii
• Indiana
• Maryland
• Rhode Island
• Vermont
• Arizona
• California
• Colorado
• Iowa
• Idaho
• Minnesota
• Montana
• North Dakota
• Nevada
• Oregon
• Utah
• Washington

Canadian Province or Territory

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

Other

• St. Pierre and Miquelon
• Labrador
• Greenland

• The Biology of Canadian Weeds: Canadian Journal of Plant Science Vol85 Pg709
• Common Weeds of Canada, Mulligan 1987 (ISBN 0-910053-59-9) See page: 55
• Common Weeds of the Canadian Prairies, 1963 (Cat# A53-1136-1) See page: 54
• Gilkey`s Weeds of the Pacific Northwest, 1980 (ISBN 0-88246-039-0) See page: 151
• How to Know the Weeds, 1972, (ISBN# 0-697-04880-2) See page: 91
• Identification Guide to the Weeds of Quebec, 1999 (ISBN# 2-89457-174-7) See page: 98
• More Turfgrass and Related Weeds: Beyond the Color Atlas, 2011 Clemson University Publishing ISBN# 978-0-9798777-5-9 See Page: 212
• Northwest Weeds, 1990 (ISBN 0-87842-249-8) See page: 49
• Ontario Weeds, 1992 Agdex 640, Publication #505 See page: 88
• S.W.S.S. Weed ID Guide, 1993 Section Number and Five letter code: 12R
• Weeds, 1955 (1980) Walter Conrad Muenscher, ISBN# 0-8014-1266-8 See page: 252, 261
• Weeds, A Golden Guide, 1972 ISBN#0-307-24353-2 See page: 62
• Weeds of Alberta, 1983 Alberta Environmental Centre Agdex 640-4, See page: 121
• Weeds of California, 1970, State of California Publications and Documents. See page: 233
• Weeds of California and other Western States, 2007 (ISBN 13: 978-1-879906-69-3) See Page: 516
• Weeds of Canada, 1970 Canada Dept. of Ag., Pub. # 948, See page: 89
• Weeds of New Jersey, 1929 New Jersey Ag. Exp. Station Circular #219, See page: 25
• Weeds of Nova Scotia, 1986 (ISBN# 0-88871-063) See page: 88
• Weeds of the Midwestern United States & Central Canada, University of Georgia 2010, ISBN#0-8203-3506-1 See page: 159
• Weeds of the North Central States, 1981 Univ. of Illinois, Urbana - Champaign Bulletin # 772, See page: 100
• Weeds of the Northeast, 1956, Univ. of Delaware Field Manual #1 See species #: 302
• Weeds of the Northeast, 1997 Cornell University ISBN# 0-8014-8334-4 See page: 170, 180
• Weeds of the Northern United States and Canada, 1964 Montgomery See page: 81
• Weeds of the Northern U.S, and Canada, 1999 Royer and Dickinson, (ISBN# 1-55105-221-0) See page: 288 - 289
• Weeds of the South, University of Georgia 2009, ISBN#0-8203-3046-9 See page: 133
• Weeds of the United States and Their Control, Lorenzi 1987, ISBN# 0-442-25884-4 See page: 160
• Listed as a `Weed` by the Biota of North America Program, 2008 x
• Listed in the WSSA Composite List of Weeds X