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Tickseed Beggarticks, Western Beggarticks, Bearded Beggarticks, Swamp Marigold
Bidens aristosa (Michx.) Britton
Asteraceae (Sunflower Family)
▲▼ mature, flowering plants
▲▼ mature, flowering plants
▲▼ mature, flowering plants
▲▼ mature, flowering plants
▲▼ stems and leaves
▲▼ inflorescences
▲▼ inflorescences
▲▼ inflorescences
▲ flowers with painted lady butterfly and soldier beetle
Bidens aristosa
(Michx.) Britton, Bearded Beggarticks, Tickseed
Beggarticks, Western Beggarticks, Swamp Marigold:
(Bayer
Code:
BIDAR; US Code BIAR)
·
Native summer annual that grows 1-4 feet tall often with purplish,
four-sided stem
·
Has opposite, pinnately compound leaves with lanceolate to linear
toothed leaflets
·
Flowers heads have yellow disk flowers, with 5-8 ray flowers and 20-80
yellow disk flowers; heads held upright in flower and during maturation
·
Seed is
short and
slenderly wedge-shaped,
with two barbs attached to tip that let it attach to passing animals
·
Found in pastures, prairies, open woods, wet soils near ponds, lakes,
streams, rivers
·
Some similar species:
o
Devil’s Beggarticks (Bidens
frondosa) has pinnately-compound
leaves with toothed, lanceolate leaflets, flowers lack ray flowers and the burs
are short and attached to a triangular seed
o
Spanish Needles
(Bidens
bipinnata) has finely-divided (bipinnately
compound) leaves, 1-5 very short (0.25 inch) ray flowers (petals) per head and
long, slender, needle-like seeds with burs at their tip
o
Nodding Beggarticks (Bidens
cernua) has simple lanceolate
leaves with toothed, lanceolate leaflets, 6-8 ray showy flowers (petals) per
head and burs and seeds similar to devil’s beggarticks
o
Swamp Beggarticks (Bidens
tripartita) has simple
lanceolate leaves with toothed margins, sometimes with 3 deep lobes; flowers
lack ray flowers; it often grows in wet soils near ponds, lakes, rivers
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Posted 19 January 2019