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Nodding Beggarticks
Bidens cernua L.
Asteraceae (Sunflower Family)
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Bidens cernua
L., Nodding Beggarticks:
(Bayer
Code:
BIDCE; US Code BICE)
·
Native summer annual that grows 1-3 feet tall with rough-textured stem
·
Has opposite or whorled,
lanceolate leaves
with smooth or serrate margins
·
Flowers heads have yellow disk flowers, with 6-8 ray
flowers (although ray flowers may sometimes be absent), and 40-100 yellow disk
flowers; heads held
upright when
blooming, but nodding
at maturity as seeds from
·
Seed is short
and slenderly wedge-shaped,
with two barbs attached to tip that let it attach to passing animals
·
Commonly found in rich, moist soils, disturbed sites, roadsides, not in
cultivated fields
·
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
Tickseed Beggarticks (Bidens
aristosa) has pinnately compound leaves with
toothed, lanceolate leaflets (leaflets often more narrow than devils beggarticks)
and 6-8 showy ray flowers (petals) per head and triangular, 2-burred seeds
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