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KNOW YOUR TREES
Norway spruce (Pinaceae Picea abies)
The large Norway Spruce that were showpieces of Christmas
celebrations in New York, Washington, and other major cities is a
non-native species that adapted well to the U.S. Common to Europe,
especially its name sake country of Norway, it is a species that
found Michigan to its liking and has thrived here.
Many of the large Norway Spruces that have graced the lawns of
the White House the State Capitol came from our own state
forestlands, both public and private.
This is the species that make large public celebrations awesome
when the lights are turned on to open the Holiday Season.
Here are some facts about this naturalized evergreen.
Leaf: Evergreen, stiff, 1/2 to 1 inch long.
Needles are 4-angled but somewhat flattened, with a sharp pointed
tip, shiny green. • Flower: Monoecious; males yellow-brown in large
groups; females upright, purple.
Fruit: Cones are very large, cylindrical, 4 to 6 inches long,
with stiff scales that are irregularly toothed, turning brown and
maturing September to November.
Twig: Slender to medium in size, lacking hair, orangish brown.
Needles are borne on woody pegs.
Bark: Red-brown and scaly, later turning gray with flaking scales
or plates.
Form: A medium to large tree with conical form, with horizontal
to upward sweeping branches that have drooping branchlets.
Source - USDAFS
Balsam Fir (Abies balsamea)
Form: Medium size, attaining heights of 40 to 60 feet and
diameter of 1 to 2 feet; short- spreading branches form a handsome,
sym- metrical, spire-like crown.
Bark: Thin, smooth, grayish, prominently marked by blisters
filled with resin or balsam pitch.
Leaf: Needle-like, stalkless and flat; length 1/2 to 1 inch with
rounded point, dark green and lustrous above and silvery white bands
beneath; twisted; 2-ranked arrangement on twig; resinous and
fragrant. Fruit: Cones upright on branches, purple, oblong; length 2
to 4 inches; be- comes mature in first year; seeds when ripe fall
together with scales of cone, leaving hard central axis standing
upright on branch like a spike.
Range: Found in forests of northern Michigan usually in
association with white spruce from which it can easily be
distinguished by its large upright cones and soft leaves; thrives in
cool, moist, or shaded places.
Wood: Light brown, soft, not strong or durable; coarse grained;
is used mainly for paper pulp; also an important Christmas tree. The
oleoresin from the pitch blisters on the bark is "Canada Balsam,"
much used in optical instruments, microscopic slides, etc. as a
transparent cement for glass.
Notes: 2 serious insect pests occur on balsam fir: the spruce
budworm and balsam woody aphid.
Needles often used as an ingredient in potpourri for their
fragrance.
Balm-Of-Gilead Poplar Populus candicans Ait.
Other common names.-Balsam poplar, balm buds.
Habitat and range.-The balm-of-Gilead tree, which has mostly
escaped from cultivation, is found along roadsides or streams from
Newfoundland to Minnesota and Georgia.
Description.-This is a large tree reaching a height of 100 feet
with a maximum trunk diameter of about 6 1/2 feet with spreading
branches, the young twigs slightly hairy, and with very resinous,
fragrant buds. The broad, pointed leaves, 2 1/2 to 6 inches long,
are somewhat heart-shaped at the base, fine toothed, dark green
above, pale beneath, and hairy when young. The male and female
flowers are borne in separate catkins 6 inches or less in length,
which appear before the leaves.
Part used.-The leaf buds.
Big Tooth Aspen (Populus grandidentata)
Big tooth aspen is a medium size tree and at best grows only 60
to 70 feet high. It is actually a small northern tree but found
throughout the mountain ranges of Virginia as far south as the North
Carolina/Virginia border.
The leaves are circular, coarse, and irregularly toothed and are
smooth, thin, olive-green to gray-green bark. It is a prolific
seeder and is commonly found on burned-over areas and on dry, sandy,
or stony sites. The early American pioneers found that the
decoctions made from the inner bark could be used as a substitute
for quinine.
The bark goes from having white-gray smooth bark with dark
longitudinal fissures to white-creamy bark with large black
horizontal bands, to furrowed and ridged, dark gray bark at the base
of the trunk.
Bigtooth Aspen has large male and female flowers on separate
trees in early spring, making this species dioecious. The male
flowers occur as large pendulous catkins (upper left), but it is the
female flowers that produce the cottony seeds that disperse in the
wind.
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