Podcast
Questions and Answers
Which tree species is characterized by needles in bundles of 5 and very large cones often hanging from high branches?
Which tree species is characterized by needles in bundles of 5 and very large cones often hanging from high branches?
Which shrub species produces a blackish-purple fruit and is known for its stout thorns?
Which shrub species produces a blackish-purple fruit and is known for its stout thorns?
What is a defining feature of Populus tremuloides?
What is a defining feature of Populus tremuloides?
Which tree is identified by its thick, corky bark and red pointed buds?
Which tree is identified by its thick, corky bark and red pointed buds?
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Which tree is commonly found in wet areas and has deeply furrowed bark as it ages?
Which tree is commonly found in wet areas and has deeply furrowed bark as it ages?
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What type of leaves does Prunus virginiana have?
What type of leaves does Prunus virginiana have?
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Which shrub is known for having red to purple or black cherries?
Which shrub is known for having red to purple or black cherries?
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What distinguishes Toxicodendron rydbergii?
What distinguishes Toxicodendron rydbergii?
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What type of fruit does Symphoricarpos albus produce?
What type of fruit does Symphoricarpos albus produce?
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What type of leaves does Apocynum androsaemifolium have?
What type of leaves does Apocynum androsaemifolium have?
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Study Notes
Trees
- Pinus monticola (Western White Pine): Thin, grey, smooth bark; needles in bundles of 5; large cones often hanging from high branches; branches arranged in whorls.
- Populus tremuloides (Trembling Aspen): Smooth bark, greenish-grey to white; nearly circular leaves with pointed tips; long, flattened petioles cause leaves to tremble; reproduces through root suckers, forming clones and groves.
- Populus trichocarpa (Black Cottonwood): Large deciduous tree thriving in wet areas; smooth grey bark becomes deeply furrowed with age; triangular leaves with pointed tips; large, fragrant, sticky reddish buds in spring.
- Pseudotsuga menziesii (Douglas-fir): Characterized by red pointed buds; thick, corky bark; features a mouse-like bract on cones; firs have soft-touch needles unlike spruce.
Shrubs
- Corylus cornuta (Beaked Hazelnut): Leaves are oval, pubescent; large yellow-green buds; leaves have doubly saw-toothed edges, share similarities with birch and alder.
- Crataegus douglasii (Black Hawthorn): Large shrub or small tree; stout straight thorns (1-3 cm); thick, leathery leaves with 5-9 lobes; produces blackish-purple pomes resembling saskatoon berries.
- Holodiscus discolor (Ocean Spray/Ironwood): Cream-colored flowers in clusters that persist after turning brown; broadly triangular lobed leaves.
- Prunus virginiana (Choke Cherry): Deciduous shrub with oval leaves, tapering at both ends; sharply toothed leaf margins; produces clusters of red to purple or black cherries, edible but astringent.
- Rubus parviflorus (Thimbleberry): Soft, fuzzy, maple-leaf shaped leaves; broad raspberry-like fruit; often grows in thickets and spreads through rhizomes.
- Symphoricarpos albus (Common Snowberry): Opposite branching with elliptical to oval leaves; smooth-edged leaves that can be irregularly lobed on young stems; spongy white, berry-like fruit is toxic and persists into winter.
- Toxicodendron rydbergii (Poison Ivy): Leaflets in sets of three, sharply pointed; can cause skin irritation; turns red in fall; caution advised.
Herbs
- Apocynum androsaemifolium (Spreading Dogbane): Branching stems with milky sap; opposite, drooping leaves; features pink flowers and paired cylindrical pods as fruit.
- Prosartes hookeri (Hooker’s Fairybells): Flowers on double stalks at stem ends; produces orange berries; has hooked hairs on leaf blades.
- Pteridium aquilinum (Bracken Fern): Stout, woody stalks emerging as single stems; fronds form an equilateral triangle with under-rolled edges.
Moss
- Polytrichum juniperinum (Juniper Haircap Moss): Tiny needle-like leaves resembling small seedlings; sporophyte has a hairy white covering on the spore-producing capsule, which often falls off in fall.
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Description
Test your knowledge on the tree species found on the college campus in ENVR 162. This quiz focuses on identifying Pinus monticola and Populus tremuloides, exploring their characteristics including bark and needle features. Perfect for students looking to deepen their understanding of local flora.
