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How to Identify and Classify Locust Trees
Contributed by: Crossley
  • 1. What is a key identifying characteristic of most locust trees?
A) Simple leaves
B) Needle-like leaves
C) Compound leaves
D) Waxy leaves
  • 2. Which type of thorn arrangement is common in many locust species?
A) Single thorns at nodes
B) Paired thorns at nodes
C) Thorns along the leaf veins
D) No thorns
  • 3. Honey locust thorns are often found where?
A) Only on the leaves
B) Only on the roots
C) Only at the base of the tree
D) On the trunk and branches
  • 4. What is the typical flower color of locust trees?
A) Yellow
B) White
C) Blue
D) Red
  • 5. Locust trees belong to what plant family?
A) Maple family (Aceraceae)
B) Rose family (Rosaceae)
C) Pine family (Pinaceae)
D) Legume family (Fabaceae)
  • 6. What type of fruit do locust trees produce?
A) An apple
B) A cone
C) A pod
D) A berry
  • 7. What is a key difference between Black Locust and Honey Locust leaves?
A) Honey Locust leaves are always smaller.
B) Black Locust leaves are always larger.
C) Honey Locust has fewer leaflets per leaf.
D) Black Locust has fewer leaflets per leaf.
  • 8. Which locust species is known for its extremely long and branched thorns?
A) Bristly Locust (Robinia hispida)
B) Water Locust (Gleditsia aquatica)
C) Honey Locust (Gleditsia triacanthos)
D) Black Locust (Robinia pseudoacacia)
  • 9. What is a common use for Black Locust wood?
A) Paper production
B) Fence posts
C) Softwood lumber
D) Christmas trees
  • 10. What is the native range of the Black Locust?
A) Southeastern United States
B) Southwest United States
C) Pacific Northwest
D) Northeastern United States
  • 11. What is a characteristic of the Black Locust's bark?
A) Smooth and thin
B) Green
C) Peeling
D) Deeply furrowed
  • 12. What characteristic helps distinguish the Water Locust from other locusts?
A) It thrives in wet or swampy areas
B) It has bright red flowers
C) It lacks thorns
D) It grows only in deserts
  • 13. Which locust species is known for its pink flowers?
A) Bristly Locust (Robinia hispida)
B) Black Locust (Robinia pseudoacacia)
C) Water Locust (Gleditsia aquatica)
D) Honey Locust (Gleditsia triacanthos)
  • 14. What type of soil does Black Locust prefer?
A) Well-drained soil
B) Sandy soil
C) Clay soil
D) Saturated soil
  • 15. What is a common problem associated with Honey Locust trees in urban settings?
A) Attracting bears
B) Susceptibility to oak wilt
C) Prolific seed pods
D) Slow growth rate
  • 16. Which locust species has flattened pods?
A) Black Locust
B) New Mexican Locust
C) Bristly Locust
D) Honey Locust
  • 17. What is a distinguishing feature of New Mexican Locust?
A) It has no thorns.
B) It is often a shrub or small tree.
C) It has round leaves.
D) It grows extremely tall.
  • 18. What is a defining characteristic of the thorns of a Honey Locust tree?
A) They are always covered in hair.
B) They are always straight.
C) They are often branched.
D) They are very small and inconspicuous.
  • 19. What is a benefit of planting locust trees?
A) Depleting soil nutrients
B) Nitrogen fixation
C) Attracting harmful insects
D) Soil erosion
  • 20. What is the typical growth rate of a Black Locust tree?
A) Very slow
B) Fast
C) Moderate
D) Slow
  • 21. What is an important consideration when planting locust trees near structures?
A) Their susceptibility to fire
B) Their sensitivity to wind
C) Their need for constant pruning
D) Their aggressive root system
  • 22. What is the term for leaves that are divided into multiple leaflets?
A) Alternate
B) Compound
C) Simple
D) Opposite
  • 23. Where would you most likely find a Water Locust?
A) Swamps
B) Deserts
C) Mountains
D) Tundra
  • 24. Which locust species is known to spread aggressively by root suckers?
A) Chinese Locust
B) Black Locust
C) Water Locust
D) Honey Locust
  • 25. What is the shape of the leaflets of Black Locust?
A) Heart-shaped
B) Round
C) Oval
D) Needle-like
  • 26. What kind of climate does Honey Locust prefer?
A) Temperate
B) Tropical
C) Desert
D) Arctic
  • 27. Which of these is NOT a characteristic to use when identifying locust trees?
A) Root color
B) Leaf structure
C) Thorn presence
D) Pod shape
  • 28. Where are the Black Locust's fragrant flowers produced?
A) At the tree's base
B) Individually
C) Erect spikes
D) In drooping clusters
  • 29. What is a key ecological role of locust trees?
A) Water depletion
B) Preventing other plant growth
C) Releasing toxins into the soil
D) Soil stabilization
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