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