Studied by 8 people
This is the list of trees and shrubs that NR220 students have know for the 2023 Session 3 Forestry part of the class
Abies lasiocarpa
- Needle single, flat in cross-section
- Twigs not roughened with sterigmata
- Cones erect
- Needle same width where it attaches to stem as in the middle
- Needles attach like suction cups (circular leaf scar)
Alnus tenuifolia
- Strobili with persistent woody bracts
- Leaves strongly doubly serrate
- Smooth stems and bark
Betula occidentalis
- Leaves irregularly serrate
- Rough twigs and bark
- Riparian
Juniperus scopulorum
- Needles scale-like, appressed, opposite, four ranked
- Small tree
- Berry-like cone
Picea engelmannii
- Needle single, 4 angled in cross section, not sharp to touch.
- Sterigmata present
Old bark cinnamon-orange, thin and scaly
- Cones less than 6 cm long
- Twigs with "peach fuzz" (hairy)
Picea pungens
- Needles 4 angled in cross section, sharp to touch
- Sterigmata present
- Old bark grayish, longitudinal ridges
- Cones greater than 6 cm long
- Twigs glabrous
Pinus contorta
- Needles 3-7 cm, in fascicles of 2
- Old bark thin and scaly
- Some closed cones (serotinous), persistent in tree
- Small cones
Pinus flexilis
- Needles in fascicles of 5
- Stems very limber
- Needles clustered at tip
- Cones resinous with thick scales
Pinus ponderosa
- Needles usually longer than 7 cm, in fascicles of 2 or 3
- Old bark thick with deep furrows, smells like cream soda
- Cones open, falling from tree, armed with a sharp prickle
Populus angustifolia
- Leaves lanceolate
- Buds terminal with overlapping scales
- Catkins drooping
Populus tremuloides
- Petiole flattened perpendicular to the plane of the leaf
- Leaves nearly circular
- Buds with overlapping scales
- Catkins drooping
Prunus virginiana
- Simple leaves, serrate margins with teeth pointing toward the tip of the leaf
- Two glands at base of petiole
Pseudotsuga menziesii
- Needles with a petiole-like constriction at base
- Cones with large, three-pointed, exerted bract
- Buds dark reddish brown, pointed
Acer glabrum
- Opposite, simple, leaves tridentate, palmately lobed and veined
- Fruit a winged sumara
- Twigs red
Amelanchier alnifolia
- Leaves simple, alternate, blunt at tip with few serrations
- Base of leaf rounded with no serrations
Arctostaphylos uva-ursi
- Simple leaves
- Low, trailing plant
- Fruit a berry
- Evergreen
Artemisia frigida
- Fine, soft leaves deeply lobed with each lobe repeatedly dissected.
- Smells like sagebrush
Grayish-green color
- Half shrub
- Increaser species
Artemisia tridentata
- Leaves simple, tridentate and fuzzy
- Sage odor
- Silvery
Betula glandulosa
- Leaves almost round, dime-sized
- Leaves crenate-serrate
- Rough bark
Ceanothus velutinus
- Leaves simple
- Leaves evergreen, waxy
- Leaves with 3 very prominent veins
Cercocarpus montanus
- Simple, alternate leaves, serrate at the tip
- Plumose tailed achene type fruit
- Base of leaf wedge-shaped with no serrations
Chrysothamnus sp.
- Leaves simple, narrowly linear
- Racemes of small yellow flowers
Clematis sp.
- Pinnately compound opposite leaves
- Trailing or climbing vines
Cornus stolonifera
- Leaves opposite, simple
- Old stems red
- Flowers in terminal clusters
- Strong arcuate venation
Jamesia americana
- Opposite, simple leaves, tomentose below (velvety leaves)
- Small shrub with peeling bark
- Terminal flowers clusters
Juniperus communis
- Needles awl-shaped, in whorls of three, sharp
- White lines on underside of leaves
- Low shrub
- Berry-like cone
Lonicera involucrata
- Opposite, simple leaves with ciliate margins
- Fruits paired
- Flowers yellow
- Weak arcuate venation
- Stems square and hairy
Mahonia repens
- Evergreen
- Pinnately compound leaves, 3-7 leaflets, spiny margins on leaves
- Looks like holly
Physocarpus monogynus
- Leaves simple, alternate
- Flowers small, in terminal clusters, white
- Fruit not a berry
- Bark very shreddy, striated
- Leaves palmately lobed and veined
- Long terminal lobe
Potentilla fruticosa
- Leaves compound, 5-7 leaflets, margin entire
- Flowers yellow
- Shreddy bark
- More recent authors refer to this species as Pentaphylloides floribunda
Purshia tridentata
- Simple leaves, alternate
- Tridentate leaf tips
Crusted leaves smell like "dirty socks"
Rhus trilobata
- Trifoliate leaves, each leaflet three lobed
- Fruit red
- Low shrub
- Strong odor when crushed
Ribes cereum
- Leaves simple, alternate
- Small shrub, no prickles
- Leaves with pleasant odor
- Palmately lobed and veined leaves
- Tubular, pink, pendant flowers
- Fruit a berry
Ribes inerme
- Stems with prickles
- Leaves simple, alternate
- Flowers in clusters of 2-3, pendant
- Leaves palmately lobed and veined
- Fruit a berry
Rosa sp.
- Stems with prickles \n - Pinnately compound leaves, leaflets 3-7, terminal one about same as lateral, serrate \n - Stipules conspicuous, adnate to petiole
Rubus deliciosus
- Stems without prickles, bark shreds in a single layer
- Leaves simple, alternate, palmately lobed
- Flowers white, single, large
- Fruit a berry
- Leaves soft and “spongy”
Rubus strigosus
- Stems with prickles
- Pinnately compound leaves, leaflets 3 (5-7), terminal one larger than others
- Adnate stipules like rabbit ears
Salix sp.
- Buds with single cap-like scale, lateral
- Catkins erect
- Usually riparian
Shepherdia canadensis
- Opposite simple leaves
- Rusty scales on the underside of leaves
- Fruit a red berry
Symphoricarpos albus
- Opposite, simple leaves
- Small, soft leaves
- Flowers white
Vaccinium sp.
Low shrub with green leaves and stems
- Simple leaves
- Deciduous
- Blueberry
- Restricted, for the most part, to Spruce-Fir community
Dryas octopetala
- Leaves alternate, simple
- Flowers solitary on naked peduncle
- Leaf margins strongly wavy and curled down toward the underside of the leaf
- Petals white, eight
- Alpine plant
Note 
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