Free Certified Horticulturist Plant Identification Questions and Answers — Questions and Answers
Question 1: Identify the plant known for its trifoliate leaves and seasonal color change.
- Japanese Maple (Acer palmatum)
- Poison Ivy (Toxicodendron radicans) (Correct answer)
- Red Clover (Trifolium pratense)
- Virginia Creeper (Parthenocissus quinquefolia)
Correct answer: Poison Ivy (Toxicodendron radicans)
Poison Ivy (Toxicodendron radicans) is famously identified by its trifoliate leaves, meaning each leaf consists of three leaflets. While it's known for causing an itchy rash, it also exhibits a distinct seasonal color change, turning vibrant shades of red, orange, or yellow in the fall before dropping its leaves. This combination of three leaves and fall color is a key identifier.
Question 2: Which plant is characterized by its needle-like leaves and is commonly used in drought-tolerant landscaping?
- Lavender (Lavandula spp.)
- Rosemary (Salvia rosmarinus)
- Juniper (Juniperus spp.) (Correct answer)
- Blue Spruce (Picea pungens)
Correct answer: Juniper (Juniperus spp.)
Juniper (Juniperus spp.) is a genus of coniferous plants widely recognized for its distinctive needle-like or scale-like leaves. Many juniper species are highly drought-tolerant once established, making them excellent choices for xeriscaping and low-water landscapes. They are also valued for their evergreen foliage and diverse forms, from groundcovers to upright trees.
Question 3: What is the common name for Quercus alba?
- Red Oak
- White Oak (Correct answer)
- Black Oak
- Live Oak
Correct answer: White Oak
Quercus alba is the scientific name for the White Oak, a prominent and long-lived deciduous tree native to eastern and central North America. It is distinguished by its light gray, scaly bark and leaves with rounded lobes, which turn reddish-brown in the fall. The name "White Oak" refers to its pale bark and light-colored wood.
Question 4: Which perennial plant is known for its heart-shaped leaves and striking purple flowers?
- Columbine (Aquilegia spp.)
- Violet (Viola spp.) (Correct answer)
- Bleeding Heart (Dicentra spectabilis)
- Hosta (Hosta spp.)
Correct answer: Violet (Viola spp.)
Violets (Viola spp.) are well-known perennial plants characterized by their charming heart-shaped leaves and often fragrant, striking purple flowers. They are common in gardens and wild areas, typically blooming in spring. This combination of heart-shaped leaves and purple flowers is a defining characteristic of many violet species.
Question 5: Which of the following is a fast-growing tree with compound leaves and invasive potential in many regions?
- Sugar Maple (Acer saccharum)
- Tree of Heaven (Ailanthus altissima) (Correct answer)
- Tree of Heaven (Ailanthus altissima)
- Northern Red Oak (Quercus rubra)
Correct answer: Tree of Heaven (Ailanthus altissima)
The Tree of Heaven (Ailanthus altissima) is an extremely fast-growing deciduous tree with large, pinnately compound leaves. It is notorious for its invasive potential in many regions, rapidly colonizing disturbed areas and outcompeting native vegetation. Its aggressive growth and prolific seed production make it a significant ecological threat.
Free Certified Horticulturist Plant Identification Questions and Answers
Identify the plant known for its trifoliate leaves and seasonal color change.