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Spotted
Knapweed (Centaurea maculosa
Lam.)
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Growth
Habit:
Biennial or short lived perennial, up to 3 ft. tall. Rosette
formed first year, flowering stalk elongates second year.
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Leaves: Long and divided
below, short and narrow above. Covered with
fine hair.
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Stems: Erect with slender
wiry branches. Covered with fine hair.
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Flowers: Seed heads mostly
on branch tips, solitary, to 1" diameter.
Pink to purple, rarely white. Seed head bracts are black tipped,
with 5 to 7
pairs of short feathery appendages.
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Roots: taproot not well developed.
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Seeds: Brownish, 1/8"
long, notched on one side of base, short tuft
of bristles at tip end.
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Other: Very aggressive, can
infest large areas quickly, offers very little
big game or livestock forage value.
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