Flower Color

• Yellow

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

• Axillary spikes

Number of Petals

• 5 petals

Petal Separation

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

Petal Tip

• Pointed
• Rounded

Flower Symmetry

• Flowers regular

Flower Length (Head length in the Asteraceae)

• 3 mm (.12 inch)
• 4 mm (.16 inch)
• 5 mm (.20 inch)

Flower Width (Head width in the Asteraceae)

• 2 mm (.08 inch)
• 3 mm (.12 inch)
• 4 mm (.16 inch)
• 5 mm (.20 inch)

Number of Sepals

• 5 sepals

Sepal Separation

• United > 75% of length

Sepal Tip

• Pointed

Flower Sex

• Bisexual (perfect)

Number of Styles

• 1 style

Number of Stamens

• 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

• Superior (hypogynous)

Fruit Type

• Capsule, 1-celled
• Legume

Fruit Length at Maturity

• 7.0 cm (2.8 inches)
• 8.0 cm (3.2 inches)
• 9.0 cm (3.6 inches)
• 1.0 dm (4.0 inches)
• > 1.5 dm (> 6.0 inches)
• 1.5 dm (6.0 inches)

Fruit Width at Maturity

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

Burs

• Fruit or seed NOT bur-like

Leaf Arrangement

• Alternate

Stipules

• Lacking
• Spines

Tendrils

• Tendrils absent

Venation

• Pinnate

Petiole (leaf stem) Blade Ratio

• Petiole 25% - 75% total length

Leaf Length (blade PLUS petiole)

• 1 - 2 dm (4.0 - 8.0 inches)
• 2 - 4 dm (8.0 - 16.0 inches)

Leaf Width

• 1 - 2 dm (4.0 - 8.0 inches)
• 2 - 4 dm (8.0 - 16.0 inches)

Leaf or Leaflet Margin

• Entire
• Ciliate

Leaf or Leaflet Blade Base

• Acute (cuneate)

Leaf or Leaflet Tip

• Acute
• Rounded (obtuse)

Leaf or Leaflet Blade Surface

• Glabrous (NO hairs)
• Pubescent

Succulence

• Not succulent

Leaf Type

• Bipinnately compound

Milky Juice

• Juice NOT milky (watery)

Woodiness

• Woody

Spines or Thorns

• Spines on leaves or stems

Aromatic (vegetative structures)

• Not aromatic

Life Cycle

• Perennial

Growth Habit (while flowering)

• Erect, spherical (bushy)

Plant Height at Maturity

• 1.5 - 2.0 meters (5.0 - 6.6 feet)
• 2 - 2.5 meters (6.6 - 8.3 feet)
• 2.5 - 5 meters (8.3 - 16.6 feet)
• more than 5.0 meters (16.6 33 feet)

Wind Dissemination

• Not wind disseminated

Moisture Regime

• Mesic
• Arid

Chlorophyll

• Present

Stem Cross Section

• Round

Flowering Stem Leaves

• Stem uniformly leafy

Main Stem Branches

• Main stem branched

Root or Vegetative Propagule

• Fibrous
• Tap Root

US State

• Kansas
• Louisiana
• Missouri
• New York
• Texas
• Arizona
• California
• Colorado
• Nevada
• Oklahoma
• Utah

Other

• Virgin Islands

• An Illustrated Guide To Arizona Weeds, 1972 (ISBN 0-8165-0288-9) 338 pages. See page: 184
• Common Weeds of the United States, 1971 (ISBN 0-486-20504-5) See page: 234
• Weeds of the West, 1992 (ISBN 0941570-13-4) See page: 342
• Weeds of the West, 2000 (ISBN 0941570-13-4) See page: 340
• Listed as a `Weed` by the Biota of North America Program, 2008 X
• Listed in the WSSA Composite List of Weeds X