Flower Color

• Yellow-orange
• Yellow
• Yellow-green

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

• Head
• Panicle
• Solitary, axillary
• Solitary, terminal

Number of Petals

• 0 (no petals)
• 5 petals

Petal Separation

• United > 75% of length

Petal Tip

• Pointed

Flower Symmetry

• Flowers regular

Flower Length (Head length 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)

Flower Width (Head width 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)

Number of Sepals

• sepals lacking
• more than 10 sepals

Sepal Separation

• Completely free to base

Sepal Tip

• Rounded

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

Burs

• Fruit or seed NOT bur-like

Leaf Arrangement

• Alternate

Leaf Type

• Pinnately dissected

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)

Leaf Width

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

Leaf or Leaflet Margin

• Parted

Leaf or Leaflet Blade Base

• Acute (cuneate)
• Acuminate (attenuate)

Leaf or Leaflet Tip

• Acute

Leaf or Leaflet Blade Surface

• Glabrous (NO hairs)

Succulence

• Not succulent

Milky Juice

• Juice NOT milky (watery)

Woodiness

• Herbaceous

Spines or Thorns

• Spines or Thorns ABSENT

Aromatic (vegetative structures)

• 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)
• 2 - 4 dm (8.0 - 16.0 inches)

Wind Dissemination

• Not wind disseminated

Moisture Regime

• Seasonally saturated
• Mesic

Chlorophyll

• Present

Stem Cross Section

• Round

Flowering Stem Leaves

• Stem uniformly leafy

Main Stem Branches

• Main stem branched

Root or Vegetative Propagule

• Tap Root

US State

• Arkansas
• Connecticut
• Delaware
• Illinois
• Kansas
• Kentucky
• Louisiana
• Massachusetts
• Maine
• Michigan
• Missouri
• Mississippi
• North Carolina
• New Hampshire
• New Jersey
• New York
• Ohio
• Pennsylvania
• South Carolina
• Tennessee
• Virginia
• Wisconsin
• West Virginia
• Indiana
• Maryland
• Rhode Island
• Vermont
• Alaska
• Arizona
• California
• Colorado
• Iowa
• Idaho
• Minnesota
• Montana
• North Dakota
• 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
• Alberta
• Manitoba
• Newfoundland
• Saskatchewan
• Yukon
• Nunavut
• Northwest Territory

Other

• St. Pierre and Miquelon
• Labrador
• Greenland

• California Growers Weed Identification Handbook, 1968 - 1998 University of California Publication # 4030-1, See page: 15
• Common Weeds of Canada, Mulligan 1987 (ISBN 0-910053-59-9) See page: 126
• Common Weeds of the Canadian Prairies, 1963 (Cat# A53-1136-1) See page: 48
• Common Weed Seedlings of the United States and Canada, 1978 Coop Ext. Univ. of Georgia, Athens, See page: 13
• Garden Weeds of Southern California, 1981, See page: 104
• Gilkey`s Weeds of the Pacific Northwest, 1980 (ISBN 0-88246-039-0) See page: 351, 352
• Identification Guide to the Weeds of Quebec, 1999 (ISBN# 2-89457-174-7) See page: 68
• More Turfgrass and Related Weeds: Beyond the Color Atlas, 2011 Clemson University Publishing ISBN# 978-0-9798777-5-9 See Page: 183
• Northwest Weeds, 1990 (ISBN 0-87842-249-8) See page: 123
• Ontario Weeds, 1992 Agdex 640, Publication #505 See page: 217
• Selected Weeds of Oregon, 1985 and 1989 Supplement (s) Oregon State Dept. of Agriculture, See page: s48
• South Dakota Weeds 2002 South Dakota Dept. of Ag. 523 E. Capitol, Foss Bldg. Pierre, South Dakota 57501 See page: 202
• S.W.S.S. Weed ID Guide, 1993 Section Number and Five letter code: 13 MATMT
• Weed Seeds of the Great Plains, 1993 University of Kansas# 92-125-B ISBN# 0-7006-0651-3 See index #: 236
• Weeds, 1955 (1980) Walter Conrad Muenscher, ISBN# 0-8014-1266-8 See page: 427, 487
• Weeds of Alberta, 1983 Alberta Environmental Centre Agdex 640-4, See page: 193
• Weeds of Arkansas 1981 (MP 169-5M-3-81) See page: 17
• Weeds of California, 1970, State of California Publications and Documents. See page: 486, 487
• Weeds of California and other Western States, 2007 (ISBN 13: 978-1-879906-69-3) See Page: 261
• Weeds of Canada, 1970 Canada Dept. of Ag., Pub. # 948, See page: 175
• Weeds of Eastern Washington and Adjacent Areas, 1972 (LOC 72-83635) See page: 314
• Weeds of Kentucky and Adjacent States, 1991 (ISBN 0-8131-1743-7) See page: 102
• Weeds of Nebraska and the Great Plains, 1994 (ISBN 0939870-00-4) See page: 166
• Weeds of Nova Scotia, 1986 (ISBN# 0-88871-063) See page: 58
• Weeds of the Midwestern United States & Central Canada, University of Georgia 2010, ISBN#0-8203-3506-1 See page: 113
• Weeds of the North Central States, 1981 Univ. of Illinois, Urbana - Champaign Bulletin # 772, See page: 226
• Weeds of the Northeast, 1956, Univ. of Delaware Field Manual #1 See species #: 292
• Weeds of the Northeast, 1997 Cornell University ISBN# 0-8014-8334-4 See page: 154
• Weeds of the Northern United States and Canada, 1964 Montgomery See page: 187
• Weeds of the Northern U.S, and Canada, 1999 Royer and Dickinson, (ISBN# 1-55105-221-0) See page: 46 - 47
• Weeds of the South, University of Georgia 2009, ISBN#0-8203-3046-9 See page: 94
• Weeds of the West, 1992 (ISBN 0941570-13-4) See page: 162
• Weeds of the West, 2000 (ISBN 0941570-13-4) See page: 162
• Weeds of Utah, 1971 UAES Special Report 21, See page: 103
• Wildly Successful Plants, A Handbook of North American Weeds, 1977 (ISBN# 0-02-528850-4) See page: 23, 125
• Listed as a `Weed` by the Biota of North America Program, 2008 x
• Listed in the WSSA Composite List of Weeds X