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Systematics of woody plants
Gymnosperms
Angiosperms
Alphabetical list of trees
Gymnosperms
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Species:
Picea pungens Engelm.
(Picea pungens Engelm.)
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Genus:
Picea
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Family:
Pinaceae
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Group:
Gymnosperms
Habitus
tree 30 - 40 m high, conical crown
branches grow in regular whorls – they are almost horizontally distributed
bark light brown
grey bork, forming irregular round plates
Buds
buds are broadly conical, yellow-brown without resin
Leaves (assimilation organs)
assimilation organs are needle-like
needles are 15 - 30 x 1.5 mm large, distinctly square, sharp terminal, firm, sickle-shaped
they stand out around the entire twig, can be variously colored (green, blue, silvery whitish, honeydew)
Flowers
it is monoecious wood, with flowers of different sexes
♂ cones are oblong-ovoid, 2.0 - 2.5 cm large, first red-purple, later yellowish-purple
♀ cones are broadly ovoid, 4.0-5.0 cm in size, crimson-red to pinkish-green, initially upright
Fruits – seeds
the fruit is a cone, 8-12 x 10-15 cm large, oblong-cylindrical , light brown, resinous
seed scales are folded, irregularly toothed at the end, thin, flexible
ripens in September of the first year
the seed is ovoid, 3 - 4 mm in size, brown, spoon-shaped, placed on a 10 - 12 mm long membranous wing
Extension
North American continent – Rocky hills at altitudes from 1,500 – 3,300 m above the sea level.
it grows singly or in groups
on the territory of Slovakia it is found only as a cultivated species
Ecology
semi-shade to sunny woody plant
in Slovak conditions completely frost-resistant
undemanding to the soil, it tolerates drought and exhalates
Significance
in ornamental horticulture, especially its colorful forms and shapes
with regard to resistance to immissions, it can be used for planting in urban environments
when creating urban greenery
as a Christmas tree
the public often uses the wrong term to describe the prickly spruce - "silver fir"
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