Flower Color

• Blue
• Blue-purple

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

• Terminal raceme

Number of Petals

• 4 petals
• 5 petals

Petal Separation

• United at base only (<25% length)
• United from 25% - 75% length
• United > 75% of length

Petal Tip

• Rounded

Flower Symmetry

• Flowers slightly irregular
• Flowers strongly irregular

Flower Length (Head length in the Asteraceae)

• 2 mm (.08 inch)
• 3 mm (.12 inch)

Flower Width (Head width in the Asteraceae)

• 1 mm (.04 inch)
• 2 mm (.08 inch)

Number of Sepals

• 4 sepals

Sepal Separation

• Completely free to base
• United at base < 25% length

Sepal Tip

• Pointed

Flower Sex

• Bisexual (perfect)

Number of Styles

• 1 style

Number of Stamens

• 2 stamens

Stamens Attached to the Petals

• Stamens attached to the petals

Stamens Connate (united)

• Filaments or anthers NOT united

Carpel Separation

• Carpels united (or one)

Number of Carpels

• 2 carpels

Ovary Position

• Superior (hypogynous)

Fruit Type

• Capsule, 2-celled

Fruit Length at Maturity

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

Fruit Width at Maturity

• 3 mm (.12 inch)
• 4 mm (.16 inch)

Burs

• Fruit or seed NOT bur-like

Leaf Arrangement

• Opposite

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)

• 5 - 10 mm (.20 - .40 inch)
• 1 - 2 cm (.40 - .80 inch)

Leaf Width

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

Leaf Shape (simple leaves only)

• Oval
• Ovate

Leaf or Leaflet Margin

• Crenate
• Entire

Leaf or Leaflet Blade Base

• Cordate
• Rounded
• Truncate

Leaf or Leaflet Tip

• Rounded (obtuse)

Leaf or Leaflet Blade Surface

• Glandular
• Hirsute
• Pubescent
• Sericeous or villous (silky)
• Villous or sericious (silky)

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

• Annual

Growth Habit (while flowering)

• Spreading ascending
• Erect, spherical (bushy)

Plant Height at Maturity

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

Wind Dissemination

• Not wind disseminated

Moisture Regime

• Mesic

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

• Alabama
• Arkansas
• Connecticut
• Delaware
• Florida
• Georgia
• Illinois
• Kansas
• Kentucky
• Louisiana
• Massachusetts
• Maine
• Michigan
• Missouri
• Mississippi
• North Carolina
• New Hampshire
• New Jersey
• New York
• Ohio
• Pennsylvania
• South Carolina
• Tennessee
• Texas
• Virginia
• Wisconsin
• West Virginia
• Hawaii
• Indiana
• Maryland
• Rhode Island
• Vermont
• Alaska
• Arizona
• California
• Colorado
• Iowa
• Idaho
• Minnesota
• Montana
• New Mexico
• Nevada
• Oklahoma
• Oregon
• South Dakota
• Utah
• Washington
• Wyoming
• Nebraska

Canadian Province or Territory

• British Columbia
• New Brunswick
• Nova Scotia
• Ontario
• Prince Edward Island
• Quebec
• Newfoundland
• Yukon

Other

• District of Columbia
• St. Pierre and Miquelon
• Labrador
• Greenland

• Common Weeds of the United States, 1971 (ISBN 0-486-20504-5) See page: 336
• Field Guide To The Common Weeds Of Kansas, 1983 (ISBN 0-7006-0233-X) See page: 98
• Garden Weeds of Southern California, 1981, See page: 97
• How to Know the Weeds, 1972, (ISBN# 0-697-04880-2) See page: 143
• Manual of Ohio Weeds, 1931 Ohio Ag. Exp. Station Bull. # 475, See page: 77, 83
• Nebraska Weeds, 1979 Nebraska Dept. of Ag., Lincoln NE, See page: 171
• Ontario Weeds, 1992 Agdex 640, Publication #505 See page: 195
• Representative Missouri Weeds and Their Control, 1941 Univ. of Missouri Ag. Exp Station Bulletin #433, See page: 163
• Weed Seeds of the Great Plains, 1993 University of Kansas# 92-125-B ISBN# 0-7006-0651-3 See index #: 180
• Weeds, 1955 (1980) Walter Conrad Muenscher, ISBN# 0-8014-1266-8 See page: 399, 400
• Weeds of Arkansas 1981 (MP 169-5M-3-81) See page: 62
• Weeds of California, 1970, State of California Publications and Documents. See page: 403
• Weeds of California and other Western States, 2007 (ISBN 13: 978-1-879906-69-3) See Page: 1486
• Weeds of Southern Turfgrasses, 1992 Univ. of Florida, Gainesville Publication # SP-79, See page: 187
• Weeds of the Midwestern United States & Central Canada, University of Georgia 2010, ISBN#0-8203-3506-1 See page: 289
• Weeds of the Northeast, 1956, Univ. of Delaware Field Manual #1 See species #: 177
• Weeds of the Northeast, 1997 Cornell University ISBN# 0-8014-8334-4 See page: 188, 308
• Weeds of the United States and Their Control, Lorenzi 1987, ISBN# 0-442-25884-4 See page: 268
• Weeds of Utah, 1971 UAES Special Report 21, See page: 83
• Listed as a `Weed` by the Biota of North America Program, 2008 x
• Listed in the WSSA Composite List of Weeds X