Illinois Audubon Society Woodland Invasives Part 2

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1. Which vining invasive species only produces fruits when growing vertically?

a. Euonymus fortunei (winter creeper)

12.7%

b. Celastrus orbiculatus (oriental bittersweet)

29.1%

c. Pueraria montana (Kudzu)

13.4%

d. All of the above

44.8%

2. Which of these plants is NOT dispersed in large part by birds?

a. Rhamnus cathartica (common buckthorn)

2.5%

b. Lonicera maackii (Amur honeysuckle)

5.6%

c. Berberis thunbergii (Japanese barberry)

20.2%

d. Microstegium vimineum (Japanese stiltgrass)

71.8%

3. Which of these invasive plants has dominantly male and female flowers on separate plants, known as being dioecious?

a. Ailanthus altissima (tree-of-heaven)

33.3%

b. Rosa multiflora (multiflora rose)

16.3%

c. Euonymus fortunei (winter creeper)

12.7%

d. Pyrus calleryana (callery pear)

37.6%

4. Which of these plants exhibit extended leafout phenology where they leaf out extra early in the spring and hold onto their leaves very late into the fall, perhaps throughout the winter.

e. A and D

36.5%

a. Euonymus fortunei (winter creeper)

32.2%

d. Lonicera maackii (Amur honeysuckle)

18.6%

g. B and D

5.4%

f. B and C

2.7%

b. Microstegium vimineum (Japanese stiltgrass)

2.5%

c. Ailanthus altissima (tree-of-heaven)

2.3%

5. A relatively new invasives species, Achyranthes japonica (Japanese chaff flower) has seeds that are NOT largely distributed by:

a. bird ingestion.

53.3%

b. floodwaters.

17.4%

c. attaching themselves to animals.

17.0%

d. equipment and soil transportation.

12.4%

6. This plant was promoted for its use as a “living fence” to confine livestock.

a. Rhamnus cathartica (common buckthorn)

29.3%

b. Berberis thunbergii (Japanese barberry)

12.7%

c. Rosa multiflora (multiflora rose)

45.5%

d. Pueraria montana (Kudzu)

12.5%

7. Which of these plants was NOT promoted for erosion control?

a. Rosa multiflora (multiflora rose)

16.7%

b. Euonymus alatus (burning bush)

63.2%

c. Elaeagnus umbellata (autumn olive)

11.4%

d. Lonicera maackii (Amur honeysuckle)

8.7%

8. Rhamnus cathartica (common buckthorn) is most likely to be found in which part of Illinois?

a. Northern Illinois.

37.6%

b. Central Illinois.

4.7%

c. Southern Illinois.

9.7%

d. Equally across Illinois.

48.0%

9. Microstegium vimineum (Japanese stiltgrass) is most likely to be found in which part of Illinois?

a. Northern Illinois.

7.3%

b. Central Illinois.

11.4%

c. Southern Illinois.

60.1%

d. Equally across Illinois.

21.2%

10. True or False: The bright red berries from bush honeysuckle (Lonicera maackii and L. tatarica) provide a quality food source for birds.

a. True

35.3%

b. False

64.7%

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