Tsuga heterophylla

Pinaceae Tsuga heterophylla (Raf.) Sarg.

Etymology
Tsuga refers to the Japanese name for this tree.
heterophylla refers to ‘different leaves’; indicating its needle lengths can differ quite a lot.

Colloquial Name
Western hemlock, Pacific hemlock

Distribution

This map shows botanical records (points) for this taxon. By opening the map’s sidebar (collapsed by default) you can toggle visibility or change the basemap. By clicking on records, you reveal more information.

TDWG Codes
7, 70, ASK, 71, ABT, BRC, 73, IDA, MNT, ORE, WAS, 76, CAL

Habitat
The natural habitats for Tsuga heterophylla are temperate forests. The natural elevation is unknown. There are no conifers associated with Tsuga heterophylla that are known of.

USDA Hardiness zone – 6
Tsuga heterophylla is hardy to USDA Zone 6 (Bannister & Neuner, 2001), meaning its frost tolerance lies somewhere in the range of -23.3C (-10F) to -17.8C (0F).

Species Continuity
The population trend for Tsuga heterophylla is increasing. There are no known threats for Tsuga heterophylla.

IUCN Category – LC
According to the IUCN Red List, Tsuga heterophylla has been assigned the status of LC(Least Concern). This means that according to the Red List criteria, this species is not qualified as threatened.

Superordinate Taxa
The nearest superordinate taxon for Tsuga heterophylla is Tsuga. The coordinate taxa for Tsuga heterophylla are therefore:

Tsuga heterophylla is further placed under Abietoideae. Tsuga heterophylla is also placed under Pinaceae.

Cultivars
‘Argenteo-variegata’, ‘Avalanche’, ‘Belvedere’, ‘Conica’, ‘Dumosa’, ‘Epstein Dwarf’, ‘Fretal’, ‘Greenmantle’, ‘Iron Springs’, ‘Jalako Compact’, ‘June Morley’, ‘Krause’s Compacta’, ‘Laursen’s Column’, ‘Morris’s Weeper’, ‘Ray Godfrey’, ‘Sixes River’, ‘Thorsen’, ‘Thorsen’s Weeping’, ‘Yellow Seedling’