How to Identify and Classify Walnut Trees
  • 1. What is the most distinguishing characteristic of walnut leaves?
A) Simple, opposite leaves
B) Needle-like leaves
C) Palmately compound leaves
D) Pinnately compound leaves
  • 2. How are walnut leaves typically arranged on the branch?
A) Oppositely
B) Alternately
C) Basal
D) Whorled
  • 3. What type of fruit does a walnut tree produce?
A) A drupe
B) A pome
C) A berry
D) A nut
  • 4. Which of these is a common species of walnut tree?
A) Juglans nigra (Black Walnut)
B) Betula papyrifera (Paper Birch)
C) Acer rubrum (Red Maple)
D) Quercus alba (White Oak)
  • 5. What is the color of the pith in a Black Walnut twig?
A) Dark brown
B) Pink
C) Green
D) White
  • 6. How can you differentiate between Black Walnut and Butternut (Juglans cinerea) using their nuts?
A) They are indistinguishable based on nuts.
B) Black Walnut nuts are rounder and harder to crack.
C) Butternut nuts are rounder and harder to crack.
D) Black Walnut nuts are smoother and easier to crack.
  • 7. What is the bark texture of a mature Black Walnut tree?
A) Peeling
B) Deeply furrowed
C) Papery
D) Smooth
  • 8. What is the typical habitat for Black Walnut trees?
A) Rich, well-drained soil
B) High altitude, rocky terrain
C) Dry, sandy soil
D) Swampy areas
  • 9. What is the shape of the leaf scar on a walnut twig?
A) Triangular
B) Round
C) V-shaped
D) U-shaped
  • 10. Walnut trees belong to which plant family?
A) Juglandaceae
B) Betulaceae
C) Rosaceae
D) Fagaceae
  • 11. What is the growth rate of a Black Walnut tree?
A) Moderate to fast
B) Very slow
C) Slow
D) Extremely fast
  • 12. Which walnut species has a sticky or resinous coating on its new growth?
A) English Walnut (Juglans regia)
B) Japanese Walnut (Juglans ailantifolia)
C) Butternut (Juglans cinerea)
D) Black Walnut (Juglans nigra)
  • 13. What is the primary use of Black Walnut wood?
A) Firewood
B) Construction lumber
C) High-end furniture and gunstocks
D) Paper pulp
  • 14. What is juglone?
A) A walnut fertilizer
B) A type of walnut fungus
C) A synonym for walnut fruit
D) A toxic substance produced by walnuts
  • 15. What impact does juglone have on other plants?
A) Inhibits the growth of some plants
B) Kills all other plants
C) Stimulates the growth of all plants
D) Has no effect on other plants
  • 16. How many leaflets are typically found on a Black Walnut leaf?
A) 7-11
B) 15-23
C) 3-5
D) 25-30
  • 17. Where are the male flowers (catkins) located on a walnut tree?
A) On the trunk
B) At the base of the tree
C) On new growth
D) On last year's growth
  • 18. What is the appearance of Butternut bark compared to Black Walnut bark?
A) Butternut bark is identical to Black Walnut bark.
B) Butternut bark is lighter and more peeling.
C) Butternut bark is darker and more furrowed.
D) Butternut bark is smoother with broader ridges.
  • 19. What is a common disease affecting Butternut trees?
A) Butternut canker
B) Oak wilt
C) Pine blister rust
D) Dutch elm disease
  • 20. Which walnut species is most commonly grown for commercial nut production?
A) Black Walnut (Juglans nigra)
B) Japanese Walnut (Juglans ailantifolia)
C) Butternut (Juglans cinerea)
D) English Walnut (Juglans regia)
  • 21. What is the shape of the nut of the English Walnut (Juglans regia)?
A) Round and symmetrical
B) Elongated and pointed
C) Oval and rough
D) Irregular and flattened
  • 22. Which of the following characteristics can help distinguish between different walnut species' twigs in the winter?
A) Fruit presence
B) Tree height
C) Leaf color
D) Bud shape and size
  • 23. What is the ecological role of walnut trees?
A) Solely timber production
B) None - they are invasive
C) Erosion control only
D) Provide food and habitat for wildlife
  • 24. What is the arrangement of the buds on a walnut twig?
A) Whorled
B) Subopposite
C) Opposite
D) Alternate
  • 25. What is the typical color of the husk surrounding a black walnut?
A) Yellow
B) Pure white
C) Greenish-brown
D) Bright red
  • 26. What is the terminal leaflet like on a Black Walnut leaf?
A) Always present and large
B) Brightly colored
C) Often missing or reduced
D) Always folded
  • 27. What does 'monoecious' mean in relation to walnut trees?
A) Having separate male and female flowers on the same tree
B) Having only male flowers
C) Having perfect flowers (both male and female parts in one flower)
D) Having only female flowers
  • 28. How can the aroma of crushed walnut leaves be described?
A) Odorless
B) Distinct and pungent
C) Sweet and floral
D) Like citrus
  • 29. What is the significance of the chambered pith in walnut twigs?
A) It helps distinguish walnut from similar trees
B) It is insignificant
C) It indicates disease
D) It provides nutrients to the tree
  • 30. What is the approximate lifespan of a Black Walnut tree?
A) Over 500 years
B) 100-200 years
C) 50-100 years
D) 20-50 years
Created with That Quiz — the site for test creation and grading in math and other subjects.