STAR
BY: Sarah Ayllon

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Kingdom: Plants ( Plantae )
Phylum:
Class: Magnoliopsida

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Introduced in California, early 20 th century
Native to Mediterranean region of southern
Europe and northern Africa
 Came accidentally through contaminated seeds

on
 Yellow Star Thistle can effect our grain fields and other agricultural areas where seeds can contaminate grain harvest and lower crop quality and value

Effects on Ecosystems
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Displaces more valuable foreign species on rangelands, reduces wildlife habitat and forage
The Star Thistle also depletes soil moisture and alters water cycle
 Major problems on annual rangelands in the
San Francisco Bay area

Food Web
Goat star thistle
Cow
Humans Sun Bee

It’s a Success!
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Growing grasslands
When 2 star thistle are combined they grow heavier
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+
For example: purple + yellow= 2x star thistle

Their Future…
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Herbicides are most effective (Applied in
Springs)
Grubbing or digging are effective