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subalpine fir
Abies lasiocarpa. resin blisters on bark, spores, soft needles
white fir (extra credit)
Abies concolor. flat, upward needles
pinon pine
pinus edulis. 2-fascicle. edible seeds. round crown
bristlecone pine
Pinus aristata. white resin flecks
ponderosa pine
Pinus ponderosa. 3 needles
lodgepole pine
Pinus contorta. cones in 2s. 2/fascicle, twisted
limber pine
Pinus flexilis. 5/fascicle, stomata rows
colorado blue spruce
Picea pungens. 4 sided needles
Douglas fir
Pseudotsuga menziesii. 3-pronged cones
rocky mountain juniper
Juniperus scopulorum. berry-like cones
Engelmann spruce (extra credit)
Picea engelmannii. leaf is like claw foot. papery thin cone
quaking aspen
Populus tremuloides. deltoid (triangle) leaf, cotton-like fruit
plains cottonwood
Populus deltoides. glossy leaf
narrow leaf cottonwood (extra credit)
Populus angustifolia. fruit string of capsules
American elm
Ulmus Americana. leaf veins on back. seed papery samara/wing
willow
Salix spp. seed hairy
green ash
Fraxinus pennsylvanica. fruit helicopters
Russian olive
Elaeagnus angustifolia. silvery leaves, fruit olives
Gambel oak
Quercus gambelii. leaves lobed, hairy under. fuzzy acorn
honeylocust
Gleditsia triacanthos. large pod with seeds inside. thorns
hackberry
Celtis occidentalis. fruit berry-like
American plum
Prunus americana. leaf dark top pale bottom, leathery. fruit is plum
Boxelder
Acer negundo. 5 leaflets. purple twigs. seeds are helicopters
silver maple (extra credit)
Acer saccharinum. leaves 5-lobed. seeds helicopters