Details of...
Scientific Name: Tsuga mertensiana
Pronunciation: SOO-guh mur-ten-zee-AY-nuh
Common Name: mountain hemlock
Family Name: Pinaceae
Plant Type: Conifer
Key ID Features: Leaves needle-like, arranged spirally all around the shoot, 7-25 mm long x 1-1.5 mm wide, margins smooth, stomata on upper and lower surface and triangular to rounded in cross-section (unlike other species of hemlock); male cones tiny, yellow when ripe; female cones spruce-like 3-8 cm long x 1.5-2.5 cm wide, dark purple becoming to red-brown when mature, pubescent.
Course(s): HORT 1193/1293, HORT 2355

Habit: Pendulous, Upright
Form: Pyramidal - narrowly
Texture: Medium - fine
Mature Size:
Height:10 - 15m
Spread:5 - 7m
Growth Rate:Slow
Origin: B.C. west of Cascades, U.S. - northwest
Hardiness Rating: Zone 4: (-34 to -29 C)
Exposure: Full sun, Part sun/part shade
Soil/ Growing Medium: Humus rich
Water Use: Wetlands
Landscape Uses: Container planting, Forestry, Reclamation, Screening, Shade tree, Specimen plant, Wetland - bogs, Wildlife food, Wind break
Additional Info: Google
mountain hemlock
Leaf Morphology: Glossary
Form: Needle-like
Arrangement: Spiraled
Texture/ Venation: Soft flexible
Surfaces: Glabrous
Colour in Summer: Bluish, Green
Colour in Fall: Bluish, Green
Leaf(let) Terms:
Shapes: Falcate, Linear
Apices: Acute
Additional Info: 2 cm long, semi-circular; blunt tip; upper surface w. groove or ridge; slender petioe; equal length on same twig.

Inflorescence Type: n/a (male cone)
Flower Morphology:Monoecious plant
Colour (petals): Male Cone, Yellow, Brown
Flower Time at Peak: Feb, Mar
Fruit Type: Cone (winged seeds)
Fruit Colour: Purple, Brown, Red
Fruiting Time: Sep, Oct
Additional Info: Showy

Bark Morphology: Moderately fissured
Bark or Stem Colour: Grey, Brown
Leaf Bud Type: Ovoid
Organ Modifications: Ectomycorrhizae

Propagation: Seed
Plant Care:
Pest Susceptibility: Aphids or adelgids, Heart rot,
(PDW) PonD West
(PHA) PolyHouse and Area
(TFL) Turf Field Lab
(TFLN) Turf Field Lab North
(WLG) WoodLand Garden
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