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Common Biennial
Weeds in Pastures:
Characteristics and Pictures
Jerry
Doll |
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larger view. |
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Bull Thistle
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leaves deeply
cut, with a wrinkled, gray-green surface |
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spines
perpendicular to leaf surface; needle-like |
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stem appears
spiny; decurrent leaves (run down along stem) |
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inflorescence
flask-shaped |
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mature plant |
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Plumeless Thistle
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whole plant
view |
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leaves deeply
divided hairy esp. lower surface midrib; leaf lobes
often at an angle to midrib |
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rosette of
plumeless thistle |
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stems are
spiny from base to tip |
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Musk Thistle
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view of plants
in typical habitat |
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leaves smooth,
with gray-green margin and white, hairless midrib |
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stem spiny
except right below flower head inflorescence 1.5 to
2" across |
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musk (left)
and bull (right) flower heads |
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Wild Parsnip
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whole plant |
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leaves and
stem |
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umbel shaped inflorescence |
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close view of
inflorescence with ripe fruits |
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Spotted Knapweed
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whole plant
view |
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top view of
inflorescence |
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side view of
inflorescence |
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view of leaves
of spotted knapweed |
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