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 Plant Deaver Herbarium (Northern Arizona University), Usage Rights: CC BY (Attribution) | | | | | |
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Origin:
Native
Life Cycle:
Annual Similar Species: Flaveria australasica
General Desc:
Erect, weedy annual with branches and stems that are often red-tinged. The round to lance-shaped green leaves are 3-veined and up to 8 inches long. The flowering stalk is a large, dense, round cluster of many tiny pale yellow or whitish flower heads.
Identification notes: Erect annual; leaves stemmed, toothed, rounded to lance-like; 30 to 300 flower heads, usually just 1 flower each, either pale yellow or whitish ray or disc flowers, in dense, stemless, axillary clusters; sepals 0; bracts usually 2.
Height:
To nearly 4 feet
Habitat Description: Grows in many types of wet habitats including those with saline, clay and gypsum (high in calcium and sulfur) rich soils. Found in moist roadside soils, waste places, stream banks and sometimes in cultivated areas.
Plant Communities:
Riparian, Disturbed Areas
Elevation: Below 4000 feet
Color:
Pale yellow or whitish
Shape:
Daisy or dandelion-like in round clusters
Tubular:
N
Flowering Period:
May - Nov
Description:
Flowering stalk is a large, dense, tight head-like cluster (glomerule) of many small flower heads. Each flower head usually contains 1 tiny tube-like yellow disc floret in the center with 1 yellow or whitish strap-shaped ray floret around the periphery.
Leaf Color:
Green
Leaf Type:
Simple
Leaf Shape:
Round or oval
Leaf Margin:
Toothed
Leaf Attachment:
Opposite
Leaves Clasp:
Y
Hairs:
No
Spines:
N
Leaf Description:
Leaves grow in opposite pairs around the stem, sometimes their bases are fused together (connate). Leaves often have stalks but those on the upper stem may be stalkless. Leaf edges usually have tiny widely spaced teeth. Stems are often red-tinged.
Fruit Color: Black
Fruit Type: Achene
Fruit Notes: Fruit is about 1/16 inch long, black, dry, with an oblong shape and 10 ribs on its surface. It doesn't split open at maturity to release the seed and doesn't have a hairy tuft (pappus) on its tip.
Seed Notes: 1 seed is produced by the fruit.
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