Flower Color

• Yellow

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

• Head
• Panicle

Number of Petals

• 5 petals
• 10 petals
• more than 10 petals

Petal Separation

• Completely free to base
• United > 75% of length

Petal Tip

• Square
• Toothed

Flower Symmetry

• Flowers regular

Flower Length (Head length in the Asteraceae)

• 1.0 cm (.40 inch)
• 1.5 cm (.6 inch)

Flower Width (Head width in the Asteraceae)

• 8 mm (.32 inch)
• 9 mm (.36 inch)
• 1.0 cm (.40 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

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

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)
• 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)
• 2 - 4 dm (8.0 - 16.0 inches)

Leaf Width

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

Leaf Shape (simple leaves only)

• Hastate (spear-head)
• Linear or filiform
• Pinnately lobed

Leaf or Leaflet Margin

• Entire
• Lobed

Leaf or Leaflet Blade Base

• Acute (cuneate)
• Clasping

Leaf or Leaflet Tip

• Acuminate (attenuate)
• Acute

Leaf or Leaflet Blade Surface

• Glabrous (NO hairs)

Succulence

• Not succulent

Milky Juice

• Juice milky

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

• 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

• Fruit, seed, or spore wind borne

Moisture Regime

• Mesic

Chlorophyll

• Present

Stem Cross Section

• Round

Flowering Stem Leaves

• Stem uniformly leafy

Main Stem Branches

• Main stem unbranched
• Main stem branched

Root or Vegetative Propagule

• Tap Root

US State

• Alabama
• Arkansas
• Delaware
• Georgia
• Illinois
• Kansas
• Kentucky
• Louisiana
• Michigan
• Missouri
• Mississippi
• North Carolina
• New Jersey
• New York
• Ohio
• Pennsylvania
• South Carolina
• Tennessee
• Texas
• Virginia
• Wisconsin
• West Virginia
• Indiana
• Maryland
• Arizona
• California
• Iowa
• New Mexico
• Nevada
• Oklahoma
• Oregon
• Washington
• Nebraska

Other

• District of Columbia

Canadian Province or Territory

• Ontario
• Quebec

• Garden Weeds of Southern California, 1981, See page: 121
• Gilkey`s Weeds of the Pacific Northwest, 1980 (ISBN 0-88246-039-0) See page: 301, 303
• Manual of Ohio Weeds, 1931 Ohio Ag. Exp. Station Bull. # 475, See page: 112
• Weed Seeds of the Great Plains, 1993 University of Kansas# 92-125-B ISBN# 0-7006-0651-3 See index #: 234
• Weeds, A Golden Guide, 1972 ISBN#0-307-24353-2 See page: 157
• Weeds of Arkansas 1981 (MP 169-5M-3-81) See page: 17
• Weeds of California, 1970, State of California Publications and Documents. See page: 481, 482
• Weeds of California and other Western States, 2007 (ISBN 13: 978-1-879906-69-3) See Page: 360
• Listed as a `Weed` by the Biota of North America Program, 2008 x
• Listed in the WSSA Composite List of Weeds X