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Ambrosia psilostachya
DEFINITIONS OF:
Ambrosia psilostachya
1
n
coarse perennial ragweed with creeping roots of dry barren lands of southwestern United States and Mexico
Synonyms:
perennial ragweed
,
western ragweed
Type of:
ambrosia
,
bitterweed
,
ragweed
any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
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