How to Identify and Classify Plums
  • 1. What is the primary fruit type of all plums?
A) Drupe
B) Aggregate Fruit
C) Berry
D) Pome
  • 2. Which characteristic is MOST important for initial plum identification?
A) Skin color
B) Leaf shape
C) Pit size
D) Branch thickness
  • 3. Japanese plums are scientifically classified under which species?
A) Prunus cerasifera
B) Prunus americana
C) Prunus domestica
D) Prunus salicina
  • 4. European plums are scientifically classified under which species?
A) Prunus salicina
B) Prunus cerasifera
C) Prunus domestica
D) Prunus americana
  • 5. Which plum species is known for its small size and often used for jams?
A) Prunus persica
B) Prunus salicina
C) Prunus domestica
D) Prunus americana
  • 6. What is a distinguishing characteristic of 'greengage' plums?
A) Red flesh
B) Freestone pit
C) Very large size
D) Green skin when ripe
  • 7. Which plum type is typically used for drying into prunes?
A) Japanese
B) American
C) Cherry
D) European
  • 8. A plum with a pointed end is most likely a...
A) Greengage plum
B) Damson plum
C) European plum
D) Japanese plum
  • 9. What pit type is most common in Japanese plums?
A) No pit
B) Semi-freestone
C) Clingstone
D) Freestone
  • 10. What pit type is most common in European plums?
A) Clingstone
B) No pit
C) Semi-freestone
D) Freestone
  • 11. A 'bloom' on a plum refers to what?
A) Insect infestation
B) Fungal growth
C) Sugar crystals
D) Waxy coating on skin
  • 12. Which plum species is also known as the 'cherry plum'?
A) Prunus salicina
B) Prunus americana
C) Prunus domestica
D) Prunus cerasifera
  • 13. The flavor profile of most European plums is generally...
A) Sweeter and less tart
B) Similar to cherries
C) Bland
D) More tart and acidic
  • 14. The flavor profile of most Japanese plums is generally...
A) Similar to apples
B) Mild and sweet
C) Tart and complex
D) Bland
  • 15. What leaf characteristic helps identify plum trees?
A) Serrations along the leaf edge
B) Needle-like leaves
C) Compound leaves
D) Smooth leaf edges
  • 16. Which ripening time best describes European plums?
A) Winter
B) Mid-summer
C) Late summer to fall
D) Early spring
  • 17. Which ripening time best describes Japanese plums?
A) Late fall
B) Winter
C) Early to mid-summer
D) Late summer to fall
  • 18. What color is the flesh of 'Santa Rosa' plums?
A) Amber to red
B) Yellow
C) Green
D) Purple
  • 19. Which factor affects plum size most significantly?
A) Tree age
B) Cultivar
C) Soil type
D) Rainfall amount
  • 20. How does chilling requirement affect plum cultivar selection?
A) Determines the size of the fruit
B) Determines suitability for the climate
C) Determines the sweetness of the fruit
D) Determines the skin color
  • 21. The shape of European plums is generally...
A) Oval
B) Pear-shaped
C) Heart-shaped
D) Round
  • 22. What does 'self-fertile' mean in the context of plum trees?
A) Grows in very poor soil
B) Needs no water
C) Requires a separate pollinator
D) Can pollinate itself
  • 23. A small, tart plum with dark blue skin is likely a...
A) Santa Rosa
B) Elephant Heart
C) Greengage
D) Damson
  • 24. Which tool is best for determining the sugar content of a plum?
A) Microscope
B) Soil pH meter
C) Refractometer
D) Tape measure
  • 25. What does 'precocity' refer to in plum trees?
A) Rapid growth rate
B) Bearing fruit early in life
C) Tolerance to drought
D) Resistance to disease
  • 26. Compared to Japanese plums, European plum trees generally...
A) Bear fruit faster
B) Require less pruning
C) Are more cold hardy
D) Have a longer lifespan
  • 27. What is the most common use of myrobalan plums?
A) Rootstock for grafting
B) Fresh eating
C) Jam making
D) Drying
  • 28. A large plum with a dark purple skin and red flesh is likely a...
A) Damson plum
B) Santa Rosa plum
C) Stanley plum
D) Elephant Heart plum
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