Flower Color

• Yellow

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

• Corymb
• Cyme (simple or branched)
• Head
• Panicle

Number of Petals

• 5 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)

• 8 mm (.32 inch)
• 9 mm (.36 inch)
• 1.0 cm (.40 inch)
• 1.5 cm (.6 inch)

Flower Width (Head width in the Asteraceae)

• 7 mm (.28 inch)
• 8 mm (.32 inch)
• 9 mm (.36 inch)
• 1.0 cm (.40 inch)
• 1.5 cm (.60 inch)

Number of Sepals

• sepals lacking
• 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

• 1 mm (.04 inch) or less
• 2 mm (.08 inch)
• 3 mm (.12 inch)

Fruit Width at Maturity

• 1 mm (.04 inch) or less
• 2 mm (.08 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
• Petiole 25% - 75% total length

Leaf Length (blade PLUS petiole)

• 1 - 2 cm (.40 - .80 inch)
• 2 - 4 cm (.80 - 1.60 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)

• Lanceolate
• Oblanceolate

Leaf or Leaflet Margin

• Dentate
• Entire
• Lobed

Leaf or Leaflet Blade Base

• Acute (cuneate)
• Clasping
• Rounded

Leaf or Leaflet Tip

• Acute
• Rounded (obtuse)

Leaf or Leaflet Blade Surface

• Glabrous (NO hairs)
• Hispid or setose

Succulence

• Not succulent

Milky Juice

• Juice milky

Woodiness

• Herbaceous

Spines or Thorns

• Spines or Thorns ABSENT

Aromatic (vegetative structures)

• Not aromatic

Life Cycle

• Annual
• Biennial

Growth Habit (while flowering)

• Erect, columnar (narrow)

Plant Height at Maturity

• 5 - 10 cm (2.0 - 4.0 inches)
• 1 - 2 dm (4.0 - 8.0 inches)
• 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

• 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

• Connecticut
• Delaware
• Illinois
• Kansas
• Kentucky
• Massachusetts
• Maine
• Michigan
• Missouri
• North Carolina
• New Hampshire
• New Jersey
• New York
• Ohio
• Pennsylvania
• Tennessee
• Texas
• Virginia
• Wisconsin
• West Virginia
• Hawaii
• Indiana
• Maryland
• Rhode Island
• Vermont
• Alaska
• California
• Colorado
• Iowa
• Idaho
• Montana
• North Dakota
• Nevada
• Oregon
• Utah
• Washington

Canadian Province or Territory

• British Columbia
• New Brunswick
• Nova Scotia
• Ontario
• Quebec
• Alberta
• Yukon

Other

• District of Columbia

• Common Weeds of Canada, Mulligan 1987 (ISBN 0-910053-59-9) See page: 111
• Gilkey`s Weeds of the Pacific Northwest, 1980 (ISBN 0-88246-039-0) See page: 299
• Northwest Weeds, 1990 (ISBN 0-87842-249-8) See page: 155
• Weeds, 1955 (1980) Walter Conrad Muenscher, ISBN# 0-8014-1266-8 See page: 454
• Weeds of California, 1970, State of California Publications and Documents. See page: 458
• Weeds of California and other Western States, 2007 (ISBN 13: 978-1-879906-69-3) See Page: 295
• Weeds of Canada, 1970 Canada Dept. of Ag., Pub. # 948, See page: 209
• Weeds of the Midwestern United States & Central Canada, University of Georgia 2010, ISBN#0-8203-3506-1 See page: 86
• Weeds of the North Central States, 1981 Univ. of Illinois, Urbana - Champaign Bulletin # 772, See page: 206
• Weeds of the Northern United States and Canada, 1964 Montgomery See page: 193
• Weeds of the West, 1992 (ISBN 0941570-13-4) See page: 125
• Weeds of the West, 2000 (ISBN 0941570-13-4) See page: 127
• Listed as a `Weed` by the Biota of North America Program, 2008 X
• Listed in the WSSA Composite List of Weeds X