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