Flower Color

• Yellow

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

• Cyme (simple or branched)
• Head
• Panicle

Number of Petals

• 5 petals
• 8 petals
• more than 10 petals

Petal Separation

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

Petal Tip

• Rounded
• Square

Flower Symmetry

• Flowers regular

Flower Length (Head length in the Asteraceae)

• 4 mm (.16 inch)
• 5 mm (.20 inch)
• 6 mm (.24 inch)
• 7 mm (.28 inch)
• 8 mm (.32 inch)

Flower Width (Head width in the Asteraceae)

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

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
• 2 mm (.08 inch)
• 3 mm (.12 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)

Leaf Length (blade PLUS petiole)

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

Leaf Width

• 1 - 2 cm (.40 - .80 inch)
• 2 - 4 cm (.80 - 1.6 inches)

Leaf Shape (simple leaves only)

• Lyrate
• Pinnately lobed

Leaf or Leaflet Margin

• Dentate
• Lobed
• Parted

Succulence

• Succulent
• Not succulent

Leaf or Leaflet Blade Base

• Acute (cuneate)
• Acuminate (attenuate)
• Clasping

Leaf or Leaflet Tip

• Acute
• Rounded (obtuse)

Leaf or Leaflet Blade Surface

• Glabrous (NO hairs)

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

• 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

• Fruit, seed, or spore wind borne

Moisture Regime

• Semi-aquatic
• Seasonally saturated
• Mesic

Chlorophyll

• Present

Stem Cross Section

• Hollow (flowering stem at maturity)
• Ridged
• Round

Flowering Stem Leaves

• Stem uniformly leafy

Main Stem Branches

• Main stem unbranched

Root or Vegetative Propagule

• Fibrous

US State

• Alabama
• Arkansas
• Florida
• Georgia
• Illinois
• Kansas
• Kentucky
• Louisiana
• Michigan
• Missouri
• Mississippi
• North Carolina
• Ohio
• Pennsylvania
• South Carolina
• Tennessee
• Texas
• Indiana
• Maryland
• Iowa
• Oklahoma
• South Dakota
• Nebraska

• S.W.S.S. Weed ID Guide, 1993 Section Number and Five letter code: 13 SENGL
• Weeds of Arkansas 1981 (MP 169-5M-3-81) See page: 18
• Weeds of Kentucky and Adjacent States, 1991 (ISBN 0-8131-1743-7) See page: 104
• Weeds of the Midwestern United States & Central Canada, University of Georgia 2010, ISBN#0-8203-3506-1 See page: 115
• Weeds of the South, University of Georgia 2009, ISBN#0-8203-3046-9 See page: 95
• Weeds of the Southern United States, 1975, North Carolina Ag. Extension Circular #599 See page: 14
• Weeds of the United States and Their Control, Lorenzi 1987, ISBN# 0-442-25884-4 See page: 323
• Listed as a `Weed` by the Biota of North America Program, 2008 x
• Listed in the WSSA Composite List of Weeds X