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)

• 1 mm (.04 inch)
• 2 mm (.08 inch)

Flower Width (Head width in the Asteraceae)

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

Carpel Separation

• Carpels united (or one)

Number of Carpels

• 2 carpels

Ovary Position

• Superior (hypogynous)

Fruit Type

• Capsule, 2-celled

Fruit Length at Maturity

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

Fruit Width at Maturity

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

Burs

• Fruit or seed NOT bur-like

Leaf Arrangement

• Alternate

Leaf Type

• Pinnately dissected
• 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)

• 1 - 2 cm (.40 - .80 inch)
• 2 - 4 cm (.80 - 1.60 inches)
• 4 - 10 cm (1.60 - 4.0 inches)
• 1 - 2 dm (4.0 - 8.0 inches)

Leaf Width

• 5 - 10 mm (.20 - .40 inch)
• 1 - 2 cm (.40 - .80 inch)
• 2 - 4 cm (.80 - 1.6 inches)
• 4 - 10 cm (1.6 - 4.0 inches)

Leaf Shape (simple leaves only)

• Cordate (heart)
• Ovate
• Pinnately lobed

Leaf or Leaflet Margin

• Entire
• Lobed
• Parted

Leaf or Leaflet Blade Base

• Auriculate
• Clasping
• Cordate
• Perfoliate

Leaf or Leaflet Tip

• Acuminate (attenuate)
• Acute

Leaf or Leaflet Blade Surface

• Glabrous (NO hairs)
• Glaucous
• Puberulent
• Pubescent

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)

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

Plant Height at Maturity

• 1 - 2 dm (4.0 - 8.0 inches)
• 2 - 4 dm (8.0 - 16.0 inches)
• 4 - 6 dm (1.3 - 2.0 feet)

Wind Dissemination

• Not wind disseminated
• Entire plant mobilized (tumbleweeds)

Moisture Regime

• Mesic
• Arid

Chlorophyll

• Present

Stem Cross Section

• Round

Flowering Stem Leaves

• Stem leaves greatly reduced
• Stem uniformly leafy

Main Stem Branches

• Main stem branched

Root or Vegetative Propagule

• Tap Root

US State

• Arkansas
• Connecticut
• Georgia
• Illinois
• Kansas
• Kentucky
• Massachusetts
• Maine
• Michigan
• Missouri
• Mississippi
• North Carolina
• New York
• Ohio
• Pennsylvania
• South Carolina
• Tennessee
• Texas
• Virginia
• Wisconsin
• West Virginia
• Maryland
• Rhode Island
• 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
• Ontario
• Quebec
• Alberta
• Newfoundland
• Saskatchewan

• Common Weeds of the Canadian Prairies, 1963 (Cat# A53-1136-1) See page: 45
• Gilkey`s Weeds of the Pacific Northwest, 1980 (ISBN 0-88246-039-0) See page: 125
• Nebraska Weeds, 1979 Nebraska Dept. of Ag., Lincoln NE, See page: 89
• Northwest Weeds, 1990 (ISBN 0-87842-249-8) See page: 47
• Ontario Weeds, 1992 Agdex 640, Publication #505 See page: 108
• Selected Weeds of Oregon, 1985 and 1989 Supplement (s) Oregon State Dept. of Agriculture, See page: s21
• Weed Seeds of the Great Plains, 1993 University of Kansas# 92-125-B ISBN# 0-7006-0651-3 See index #: 78
• Weeds, 1955 (1980) Walter Conrad Muenscher, ISBN# 0-8014-1266-8 See page: 240, 250
• Weeds, A Golden Guide, 1972 ISBN#0-307-24353-2 See page: 61
• Weeds and Poisonous Plants of Wyoming and Utah 1987 (ISBN 0-941570-06-1) See page: 60
• Weeds of California, 1970, State of California Publications and Documents. See page: 232
• Weeds of California and other Western States, 2007 (ISBN 13: 978-1-879906-69-3) See Page: 500
• Weeds of Canada, 1970 Canada Dept. of Ag., Pub. # 948, See page: 78
• Weeds of Colorado, 1990 Cooperative Extension, Colorado State Univ. Bulletin 521A, See page: 82
• Weeds of Eastern Washington and Adjacent Areas, 1972 (LOC 72-83635) See page: 162
• Weeds of Nebraska and the Great Plains, 1994 (ISBN 0939870-00-4) See page: 213
• Weeds of the Northeast, 1956, Univ. of Delaware Field Manual #1 See species #: 283
• Weeds of the Northern United States and Canada, 1964 Montgomery See page: 79
• Weeds of the West, 1992 (ISBN 0941570-13-4) See page: 232
• Weeds of the West, 2000 (ISBN 0941570-13-4) See page: 230
• Weeds of Utah, 1971 UAES Special Report 21, See page: 47
• Listed as a `Weed` by the Biota of North America Program, 2008 x
• Listed in the WSSA Composite List of Weeds X