Dumb Cane Trivia Questions and Answers

green leaf plant

1: What is the common name for the plant genus Dieffenbachia?
A: Leopard Lily
B: Snake Plant
C: Spider Plant
D: English Ivy
Correct Answer: A
Explanation: The genus Dieffenbachia is commonly known as Dumb Cane or Leopard Lily.

2: In which geographical regions are Dumb cane plants naturally found?
A: From Mexico to Argentina
B: From Canada to Brazil
C: From Europe to South Africa
D: From Siberia to India
Correct Answer: A
Explanation: Dumb cane is native to the New World Tropics from Mexico and the West Indies south to Argentina.

3: Why are Dumb cane plants popular as houseplants?
A: They need very little water
B: They tolerate shade well
C: They grow colorful flowers
D: They repel insects
Correct Answer: B
Explanation: Dumb cane plants are popular as houseplants because of their tolerance of shade.

4: What is the toxic component of Dumb cane that can cause temporary inability to speak?
A: Cyanide
B: Mercury
C: Raphides
D: Asbestos
Correct Answer: C
Explanation: Dumb cane contains needle-shaped calcium oxalate crystals called raphides, which can cause a temporary inability to speak.

5: Who named the Dumb cane plant genus Dieffenbachia?
A: Joseph Dalton Hooker
B: Heinrich Wilhelm Schott
C: Carl Linnaeus
D: Asa Gray
Correct Answer: B
Explanation: Heinrich Wilhelm Schott named the genus Dieffenbachia to honor his head gardener Joseph Dieffenbach.

6: What phenomenon involving frogs and Dumb cane plants was observed in Costa Rica?
A: Frogs use leaf axils for laying eggs
B: Frogs eat the Dumb cane leaves
C: Frogs use the plant sap for defense
D: Frogs sleep on Dumb cane leaves
Correct Answer: A
Explanation: Researchers in Costa Rica found that the strawberry poison frog deposited almost all their tadpoles on the leaf axils of Dumb cane.

7: What temperature range is generally ideal for growing Dumb cane indoors?
A: 32–50 °F (0–10 °C)
B: 50–60 °F (10–15 °C)
C: 62–80 °F (17–27 °C)
D: 85–100 °F (29–38 °C)
Correct Answer: C
Explanation: Dumb cane prefers average home temperatures of 62–80 °F (17–27 °C).

8: How often should most Dumb cane plants be watered?
A: Once a month
B: Once a week
C: Twice a week
D: Every day
Correct Answer: C
Explanation: Most Dumb cane plants require water about twice a week.

9: What type of soil is best suited for Dumb cane seguine?
A: Sandy soil
B: Clay soil
C: Loose well-aerated soil
D: Peaty soil
Correct Answer: C
Explanation: Dumb cane seguine prefers loose well-aerated soils that retain moisture.

10: What are the two cultivars of Dumb cane that have gained the Royal Horticultural Society’s Award of Garden Merit?
A: ‘Camille’ and ‘Tropic Snow’
B: ‘Golden Showers’ and ‘Blue Moon’
C: ‘Emerald Queen’ and ‘Ruby Red’
D: ‘Purple Heart’ and ‘Sky Blue’
Correct Answer: A
Explanation: The cultivars ‘Camille’ and ‘Tropic Snow’ have gained the Royal Horticultural Society’s Award of Garden Merit.

11: What is a common symptom if a child or pet chews on a Dumb cane leaf?
A: Temporary blindness
B: Intense numbing and oral irritation
C: Sudden fever
D: Hair loss
Correct Answer: B
Explanation: Chewing on a Dumb cane leaf can cause intense numbing, oral irritation, excessive drooling, and localized swelling.

12: How should severe pain from prolonged contact with Dumb cane be treated?
A: Gastric lavage
B: Application of cold packs
C: Immediate surgery
D: Analgesic agents and antihistamines
Correct Answer: D
Explanation: Severe pain from prolonged contact with Dumb cane can generally be treated with analgesic agents and antihistamines.

13: How tall can a Dumb cane plant grow indoors?
A: 1–2 feet
B: 3–5 feet
C: 6–10 feet
D: More than 15 feet
Correct Answer: C
Explanation: Dumb cane can grow up to around 9.75 feet indoors, as evidenced by a 47-year-old houseplant example.

14: Why is there a myth that Dumb cane is a deadly poison?
A: Because it emits a foul odor
B: Urban legends
C: It is used in witchcraft
D: It changes color when touched
Correct Answer: B
Explanation: Stories that Dumb cane is a deadly poison are urban legends.

15: What is the scientific name for the family to which Dumb cane belongs?
A: Lamiaceae
B: Rosaceae
C: Araceae
D: Fabaceae
Correct Answer: C
Explanation: Dumb cane belongs to the family Araceae.

16: What are the distinctive features of Dumb cane leaves?
A: Red stripes and yellow edges
B: White spots and flecks
C: Blue veins and green tips
D: Purple spots and brown edges
Correct Answer: B
Explanation: Dumb cane leaves have white spots and flecks, making them attractive as indoor foliage.

17: During a long-term study, which animal’s abundance affected the Dumb cane population in Costa Rica?
A: Jaguars
B: Collared peccary
C: Armadillos
D: Parrots
Correct Answer: B
Explanation: The increased abundance of the collared peccary, a small pig-like animal, led to a decline in Dumb cane plants.

18: What is an appropriate fertilizer for Dumb cane plants?
A: Nitrogen-heavy fertilizer
B: General-purpose houseplant fertilizer
C: Orchid-specific fertilizer
D: Tomato fertilizer
Correct Answer: B
Explanation: Dumb cane plants should be regularly fertilized with an appropriate houseplant fertilizer.

19: What type of sunlight is best for Dumb cane plants?
A: Direct sunlight
B: Full shade
C: Filtered sunlight through a window
D: No sunlight
Correct Answer: C
Explanation: Dumb cane needs light but filtered sunlight through a window is usually sufficient.

20: How is yellowing of Dumb cane leaves generally interpreted?
A: Natural aging process
B: Sign of problematic conditions, such as nutrient deficiency
C: Genetic mutation
D: Over-fertilization
Correct Answer: B
Explanation: Yellowing of the leaves is generally a sign of problematic conditions, such as a nutrient deficiency in the soil.

21: What is the minimum temperature for growing Dumb cane indoors?
A: 0 °C (32 °F)
B: 5 °C (41 °F)
C: 10 °C (50 °F)
D: 15 °C (59 °F)
Correct Answer: B
Explanation: Dumb cane must be grown indoors in temperate areas with a minimum temperature of 5 °C (41 °F).

22: In what type of forests are Dumb cane populations fluctuated by the presence of certain frogs?
A: Tropical rainforests
B: Secondary forests
C: Mangrove forests
D: Temperate forests
Correct Answer: B
Explanation: The frog population fluctuated with the abundance of Dumb cane in secondary forests.

23: What is the correct pronunciation of the genus name Dieffenbachia?
A: /ˌdaɪfɪnˈbækiə/
B: /ˌdiːfɪnˈbækiə/
C: /ˌdaɪfˈnbæʃə/
D: /ˌdiːfɪnˈbaɪkə/
Correct Answer: B
Explanation: The correct pronunciation of Dieffenbachia is /ˌdiːfɪnˈbækiə/.

24: Which subfamily does Dumb cane belong to in the family Araceae?
A: Aroideae
B: Pothoideae
C: Monsteroideae
D: Orontioideae
Correct Answer: A
Explanation: Dumb cane belongs to the subfamily Aroideae in the family Araceae.

25: What are the vertical structures observed in the cross-section of the Dumb cane stem?
A: Xylem and phloem
B: Trichomes
C: Sporangia
D: Stomata
Correct Answer: A
Explanation: The cross-section and radial section of Dumb cane stems show structures like xylem and phloem.

26: What effect does chewing on a Dumb cane leaf have?
A: It acts as an antiseptic
B: Causes a temporary burning sensation and erythema
C: Acts as an appetite suppressant
D: Causes hallucinations
Correct Answer: B
Explanation: If chewed, Dumb cane’s raphides can cause a temporary burning sensation and erythema.

27: What care should be taken with Dumb cane in relation to children and pets?
A: Keep it in direct sunlight away from them
B: Ensure it is stored horizontally
C: Prevent them from chewing the plant
D: Dust the leaves regularly
Correct Answer: C
Explanation: Contact with Dumb cane, especially chewing, can cause unpleasant symptoms, making it important to prevent children and pets from chewing the plant.

28: How is simple exposure to Dumb cane generally treated?
A: Immediate surgery
B: Treatment with analgesic agents or medical charcoal
C: Long-term counseling
D: UV light therapy
Correct Answer: B
Explanation: Simple exposure to Dumb cane can generally be treated with analgesic agents, antihistamines, or medical charcoal.

29: What plant classification does Dumb cane fall under?
A: Moss
B: Fern
C: Herbaceous plant
D: Woody plant
Correct Answer: C
Explanation: Dumb cane is a perennial herbaceous plant.

30: What should be done if severe swelling occurs from contact with Dumb cane?
A: Apply insect repellent
B: Use a cold compress
C: Seek hospitalization
D: Perform a blood transfusion
Correct Answer: C
Explanation: Severe swelling from contact with Dumb cane, particularly in the throat, may necessitate hospitalization due to breathing difficulties.

31: Are the effects of Dumb cane poisoning usually life-threatening?
A: Yes, they always require immediate ER attention
B: No, they are rarely life-threatening
C: Yes, they result in permanent damage
D: No, they usually cause no discomfort
Correct Answer: B
Explanation: The effects of Dumb cane poisoning are rarely life-threatening with most cases being mild and self-treatable.

32: What part of the Dumb cane contains raphides?
A: Roots
B: Leaves
C: Flowers
D: Seeds
Correct Answer: B
Explanation: The cells of the Dumb cane plant, particularly in the leaves, contain needle-shaped calcium oxalate crystals called raphides.

33: What consequence did researchers observe in the plant population due to the presence of collared peccary in La Selva Biological Station?
A: They increased
B: They remained stable
C: They rapidly declined
D: They changed color
Correct Answer: C
Explanation: The presence of the collared peccary led to a rapid decline in the Dumb cane population.

34: How should the soil be maintained for Dumb cane plants?
A: Extremely dry
B: Moderately moist
C: Saturated with water
D: Consistently frozen
Correct Answer: B
Explanation: Dumb cane plants need moderately moist soil.

35: What did Heinrich Wilhelm Schott’s position at the Botanical Gardens in Vienna entail?
A: Director
B: Assistant
C: Storage clerk
D: Librarian
Correct Answer: A
Explanation: Heinrich Wilhelm Schott was the director of the Botanical Gardens in Vienna.

36: How do Dumb cane leaves indicate proper conditions for continued growth?
A: They turn brown at edges
B: They stay glossy and green
C: They develop yellow spots
D: They fall off quickly
Correct Answer: B
Explanation: Healthy Dumb cane leaves will be glossy and green, indicating good growing conditions.

37: What maintenance issue is indicated when Dumb cane leaves periodically roll up and fall off?
A: End of plant life
B: Making way for new leaves
C: Root rot
D: Overwatering
Correct Answer: B
Explanation: Leaves rolling up and falling off can be a natural process to make way for new leaves.

38: By which common name is the Dumb cane also known?
A: Mother-in-law’s tongue
B: Mother-in-law’s crown
C: Grandmother’s vine
D: Father’s shield
Correct Answer: A
Explanation: Dumb cane is also commonly called mother-in-law’s tongue due to its toxic effect.

39: What is the significance of the collared peccary in relation to the Dumb cane plant?
A: Pollinates the plant
B: Feeds on the plant
C: Protects the plant from pests
D: Causes the plant to bloom
Correct Answer: B
Explanation: The collared peccary feeds on Dumb cane, impacting its population.

40: In what kind of research station was a significant Dumb cane survey conducted?
A: Agricultural
B: Biological
C: Geological
D: Oceanographic
Correct Answer: B
Explanation: The Dumb cane survey was conducted at the La Selva Biological Station.

41: What household products should be avoided near Dumb cane plants to prevent leaf yellowing?
A: Oil-based sprays
B: General houseplant fertilizer
C: Light filtered through windows
D: Bulb-type watering cans
Correct Answer: A
Explanation: Oil-based sprays can cause issues such as leaf yellowing for Dumb cane.

42: Which Dieffenbachia species are native to Costa Rica and Panama?
A: Dumb cane concinna and oerstedii
B: Dumb cane countryana and amara
C: Dumb cane delicate and chariot
D: Dumb cane mars and zara
Correct Answer: A
Explanation: Dumb cane concinna and oerstedii are native to Costa Rica and Panama.

43: What plant family is known for having engaging indoor foliage like Dumb cane?
A: Solanaceae
B: Liliaceae
C: Araceae
D: Poaceae
Correct Answer: C
Explanation: Araceae family plants, including Dumb cane, are known for their attractive indoor foliage.

44: What happens when Dumb cane plants are exposed to excessively hot conditions?
A: They grow rapidly
B: Their leaves turn black
C: They drop leaves
D: They grow thick bark
Correct Answer: C
Explanation: Dumb cane may drop leaves if exposed to excessively high temperatures and unsuitable conditions.

45: Which Dumb cane species is common on tropical islands?
A: Seguine
B: Treciantum
C: Bela moris
D: Alpine
Correct Answer: A
Explanation: Some species, like Dumb cane seguine, have become naturalized on tropical islands.

46: How is mild exposure to Dumb cane typically managed for pets?
A: Isolation and rest
B: Sugar-laden foods
C: Immediate ventilation
D: Analgesics or antihistamines
Correct Answer: D
Explanation: Pets may require analgesics or antihistamines for mild exposure to Dumb cane.

47: When was the significant Dumb cane survey in Costa Rica initiated?
A: 1988
B: 1998
C: 2008
D: 2018
Correct Answer: B
Explanation: The survey began in 1998.

48: How is the presence of Dumb cane in interiors typically maintained?
A: Direct, full sunlight
B: Filtered sunlight and regular moisture
C: Artificial lighting 24/7
D: Constant fertilizing and heavy watering
Correct Answer: B
Explanation: Dumb cane requires filtered sunlight and moderately moist soil.

49: For how long can severe symptoms from Dumb cane last if contact is sustained?
A: Several hours
B: A day
C: Several days to weeks
D: A month
Correct Answer: C
Explanation: Severe pain from prolonged exposure to Dumb cane can last several days to weeks.

50: What other houseplants are known for causing temporary inability to speak?
A: Roses
B: Daffodils
C: Sansevieria species
D: Cacti
Correct Answer: C
Explanation: Sansevieria species are also known for effects similar to Dumb cane.

51: What insect is rarely problematic for Dumb cane houseplants?
A: Spider mites
B: Aphids
C: Houseflies
D: Fungus gnats
Correct Answer: C
Explanation: Houseflies are rarely problematic for Dumb cane plants.

52: What is one method to increase the humidity around Dumb cane to make it grow better?
A: Spray water on leaves regularly
B: Place it on a sunny windowsill
C: Surround it with dry soil
D: Add a dehumidifier
Correct Answer: A
Explanation: Regularly spraying water on the leaves can help increase humidity for Dumb cane.

53: What is the specific term for the ornamental arrangement of Dumb cane’s leaves?
A: Pinnate brevity
B: Whorled noisettes
C: Baroque placement
D: Alternate leaves with flecks
Correct Answer: D
Explanation: Dumb cane has an arrangement of alternate leaves with white spots and flecks.

54: What part of the plant do collared peccaries typically consume, contributing to population decline?
A: Trunks
B: Roots
C: Flowers
D: Leaves
Correct Answer: D
Explanation: Collared peccaries feed on Dumb cane leaves, contributing to the plant’s population decline.

55: What additional condition might be indicated by leaf yellowing in Dumb cane?
A: Pest infestation
B: Excessive growth
C: Optimal health
D: Nutrient sufficiency
Correct Answer: A
Explanation: Yellowing leaves can also indicate pest infestation among other problematic conditions.

56: Which country is not part of the natural distribution range of Dumb cane oerstedii?
A: Guatemala
B: Nicaragua
C: Portugal
D: Panama
Correct Answer: C
Explanation: Portugal is not within the natural distribution range of Dumb cane oerstedii.

57: During what time of year should Dumb cane generally receive less water?
A: Winter
B: Spring
C: Summer
D: Fall
Correct Answer: A
Explanation: Dumb cane should generally receive less water during winter.

58: What award did the Dumb cane cultivar ‘Camille’ receive?
A: The Green Thumb Award
B: The Royal Horticultural Society’s Award of Garden Merit
C: The International Plant Society’s Gold Medal
D: The Houseplant of the Year Award
Correct Answer: B
Explanation: The Dumb cane cultivar ‘Camille’ received the Royal Horticultural Society’s Award of Garden Merit.

59: What are the botanical growth forms of Dumb cane?
A: Algae-like
B: Herbaceous
C: Woody shrub
D: Climbing vine Correct Answer: B
Explanation: Dumb cane is characterized as a perennial herbaceous plant.

60: What should be done if a Dumb cane plant’s leaves turn brown at the edges?
A: Increase watering
B: Move to a sunnier location
C: Check for drafts and adjust humidity
D: Fertilize weekly
Correct Answer: C
Explanation: Brown edges on Dumb cane leaves often indicate issues with drafts or low humidity, so checking and adjusting these conditions can help.

What is the best quiz for you business?

Quizzes are super effective for lead generation and selling products. Find the best quiz for your business by answering a few questions.

Take the quiz