WEEDS TO KNOW

Question 1

WHAT ARE THE MAIN FAMILIES OF MANY NOXIOUS WEEDS IN OREGON?

Answer 1

• Asteraceae (Sunflower)
• Scrophulariaceae (Figwort)
• Apiaceae (Parsley)
• Fabaceae (Pea)
• Brassicaceae (Mustard)

Question 2

What are 9 species of noxious weeds in the Sunflower Family (Asteraceae)?

Answer 2

1. Yellow Starthistle
2. Wooly Distaff Thistle
3. Canada Thistle
4. Scotch Thistle
5. Musk Thistle
6. Spotted Knapweed
7. Russian Knapweed
8. Diffuse Knapweed
9. Tansy Ragwort

Question 3

What are 2 species of noxious weeds in the Figwort Family (Scrophulariaceae)?

Answer 3

1. Dalmatian Toadflax
2. Yellow Toadflax

Question 4

What are 3 species of noxious weeds in the Pea family (fabaceae)?

Answer 4

1. Gorse
2. Kudzu
3. Scotch Broom

Question 5

What are 2 species of noxious weeds in the Mustard family (Brassicaceae)?

Answer 5

1. Hoary cress (Whitetop)
2. Perennial Pepperweed

Question 6

What are above-ground horizontal stems common to creeping perennials?

Answer 6

Stolons

Question 7

Dandelion and Curly dock are both ___ .

Answer 7

Simple perennials (reproducting through seed and resprouting from fleshy taproot).