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Sunflowers
(
Helianthus annuus
) are large
flowering plants
native to the
Americas
. They most commonly grow to heights between 1.5 and 3.5 m (5 and 11 ft), although the tallest known sunflower reached 12 m (39 ft) high. The large
inflorescence
is composed of a
flower head
(or "composite flower") of numerous florets (small flowers) crowded together. The florets within the sunflower's cluster are arranged in
a spiral pattern
and will mature into
seeds
. The seeds are used as
snack food
,
expeller pressed
into
sunflower oil
, made into
sunflower butter
(a
peanut butter
alternative), or
milled
into
flour
.
Photo:
Fir0002
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