Flower Color

• Yellow

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

• Panicle
• Terminal raceme

Number of Petals

• 5 petals

Petal Separation

• Completely free to base

Petal Tip

• Pointed

Flower Symmetry

• Flowers regular

Flower Length (Head length in the Asteraceae)

• 4.0 cm (1.6 inches)
• 4.5 cm (1.8 inches)
• 5.0 cm (2.0 inches) or more

Flower Width (Head width in the Asteraceae)

• > 5.0 cm (> 2.0 inches)

Number of Sepals

• 5 sepals

Sepal Separation

• Completely free to base

Sepal Tip

• Pointed

Flower Sex

• Bisexual (perfect)

Number of Styles

• 1 style

Number of Stamens

• more than 10 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

• 1 carpel

Ovary Position

• Inferior (epigynous)

Fruit Type

• Capsule, 1-celled

Fruit Length at Maturity

• 3.0 cm (1.2 inches)
• 3.5 cm (1.4 inches)
• 4.0 cm (1.6 inches)
• 4.5 cm (1.8 inches)
• 5.0 cm (2.0 inches)

Fruit Width at Maturity

• 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)

Burs

• Fruit or seed 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)

• 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)
• 2 - 4 dm (8.0 - 16.0 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)

• Lanceolate
• Ovate
• Spatulate

Leaf or Leaflet Margin

• Dentate
• Undulate (sinuate, repand)

Leaf or Leaflet Blade Base

• Acuminate (attenuate)

Leaf or Leaflet Tip

• Acute

Leaf or Leaflet Blade Surface

• Scabrous (like sand paper)
• Glochidiate (barbed)

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

• Biennial
• Perennial

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)
• 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

• Not wind disseminated

Moisture Regime

• Arid

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

Canadian Province or Territory

• British Columbia

US State

• California
• Colorado
• Idaho
• Montana
• Nevada
• Oregon
• Utah
• Washington
• Wyoming

• California Growers Weed Identification Handbook, 1968 - 1998 University of California Publication # 4030-1, See page: 219
• Listed as a `Weed` by the Biota of North America Program, 2008 x