Flower Color

• Yellow

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

• Head
• Panicle

Number of Petals

• 5 petals
• 8 petals
• 9 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)

• 5 mm (.20 inch)
• 6 mm (.24 inch)
• 7 mm (.28 inch)
• 8 mm (.32 inch)
• 9 mm (.36 inch)
• 1.0 cm (.40 inch)

Flower Width (Head width in the Asteraceae)

• 4 mm (.16 inch)
• 5 mm (.20 inch)
• 6 mm (.24 inch)
• 7 mm (.28 inch)
• 8 mm (.32 inch)
• 9 mm (.36 inch)
• 1.0 cm (.40 inch)

Number of Sepals

• sepals lacking
• 7 sepals
• 8 sepals
• 9 sepals
• 10 sepals
• more than 10 sepals

Sepal Separation

• Completely free to base

Sepal Tip

• Pointed

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

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

Fruit Width at Maturity

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

Burs

• Fruit or seed NOT bur-like

Leaf Arrangement

• All basal
• 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)

• 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

• 1 - 5 mm (.04 - .20 inch)
• 5 - 10 mm (.20 - .40 inch)
• 1 - 2 cm (.40 - .80 inch)
• 2 - 4 cm (.80 - 1.6 inches)

Leaf Shape (simple leaves only)

• Linear or filiform
• Oblanceolate
• Pinnately lobed
• Runcinate

Leaf or Leaflet Margin

• Entire
• Lobed
• Parted

Leaf or Leaflet Blade Base

• Acuminate (attenuate)
• Clasping

Leaf or Leaflet Tip

• Acute
• Rounded (obtuse)

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

• Perennial

Growth Habit (while flowering)

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

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)
• 1 - 1.5 meters (3.3 - 5.0 feet)

Wind Dissemination

• Fruit, seed, or spore wind borne

Moisture Regime

• Mesic
• Arid

Chlorophyll

• Present

Stem Cross Section

• Round

Flowering Stem Leaves

• Stem leafless
• Stem leaves greatly reduced

Main Stem Branches

• Main stem branched

Root or Vegetative Propagule

• Rhizomatous
• Tap Root

US State

• Delaware
• Georgia
• Michigan
• New Jersey
• New York
• Pennsylvania
• Virginia
• West Virginia
• Indiana
• Maryland
• California
• Idaho
• Montana
• Oregon
• Washington

Canadian Province or Territory

• British Columbia
• Ontario

Other

• District of Columbia

• Gilkey`s Weeds of the Pacific Northwest, 1980 (ISBN 0-88246-039-0) See page: 307
• Northwest Weeds, 1990 (ISBN 0-87842-249-8) See page: 153
• Selected Weeds of Oregon, 1985 and 1989 Supplement (s) Oregon State Dept. of Agriculture, See page: 79
• South Dakota Weeds 2002 South Dakota Dept. of Ag. 523 E. Capitol, Foss Bldg. Pierre, South Dakota 57501 See page: 184
• S.W.S.S. Weed ID Guide, 1993 Section Number and Five letter code: 13 CHOJU
• Weeds, 1955 (1980) Walter Conrad Muenscher, ISBN# 0-8014-1266-8 See page: 445
• Weeds and Poisonous Plants of Wyoming and Utah 1987 (ISBN 0-941570-06-1) See page: 184
• Weeds of California and other Western States, 2007 (ISBN 13: 978-1-879906-69-3) See Page: 264
• Weeds of Eastern Washington and Adjacent Areas, 1972 (LOC 72-83635) See page: 286
• Weeds of the West, 1992 (ISBN 0941570-13-4) See page: 98
• Weeds of the West, 2000 (ISBN 0941570-13-4) See page: 100
• Listed as a `Weed` by the Biota of North America Program, 2008 X
• Listed in the WSSA Composite List of Weeds X