Abies lasiocarpa (Subalpine Fir or Rocky Mountain Fir)


Botanical Information

FamilyPinaceae
GenusAbies
Specieslasiocarpa
CategoryWoody
TypeTree (evergreen)
OriginWestern North America; Yukon to Idaho.
Pronunciation

Details

USDA Hardiness Zone5
USDA Hardiness Ref.
Canadian Hardiness Zone4 - 6a
Canada Hardiness Ref.
RHS Hardiness ZoneH7
RHS Hardiness Ref.
Temperature (°C)-29 to -23
Temperature (°F)-20 to -10
Height20 m
Spread2 m
GrowthSlow
Flowering PeriodApril, May

Description and Growing Information

ID CharacteristicIt is a large coniferous tree with deep green needles and spreading branches. It also has a tight conical tip.
ShapeIt is wide spread but loosely conical in nature. It has a very tight cone shape at the top.
LandscapeThis tree is useful as a windbreak.
Propagation
CultivationIt is very hardy and can handle many different types of soils. It is also a plant that can handle brief periods of drought fairly well, but will not endure such conditions for a long period of time.
PestsNo specific pests are known for this species.
HabitatThis tree grows all along the western coastline in high altitudes, such as the Rocky Mountain Range. It also grows from south Yukon to Idaho.
Bark/Stem DescriptionThe bark on young trees is smooth, gray, and with resin blisters, becoming rough and fissured or scaly on old trees.
Flower/Leaf Bud DescriptionBuds are the same basic colour as the bark, and are very large and scaled.
Leaf DescriptionThe leaves are flat, needle-like, 1.5 - 3 cm long, glaucous green above with a broad stripe of stomata and two blue-white stomatal bands below; the fresh leaf scars are reddish. They are arranged spirally on the shoot, but with the leaf bases twisted.
Fruit DescriptionThe cones are erect, 6 – 12 cm long, dark blackish purple with fine yellow-brown pubescence, ripening brown and disintegrating to release the winged seeds in early autumn.
Colour DescriptionThe tree is deep green in colour with similarly coloured flowers.

Photographs