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The distribution of T. mertensiana stretches from Kenai Peninsula, Alaska, to northern Tulare County, California. [4] [5] [6] Its range fairly closely matches that of T. heterophylla (western hemlock), found less than 100 kilometers (62 miles) from the Pacific Ocean, apart from an inland population in the Rocky Mountains in southeast British Columbia, northern Idaho, and western Montana.
Tsuga heterophylla, the western hemlock [2] or western hemlock-spruce, [3] is a species of hemlock native to the northwest coast of North America, with its northwestern limit on the Kenai Peninsula, Alaska, and its southeastern limit in northern Sonoma County, California. [4] [5] The Latin species name means 'variable leaves'. [6]
Tsuga (/ ˈ s uː ɡ ə /, [3] from Japanese 栂 (ツガ), the name of Tsuga sieboldii) is a genus of conifers in the subfamily Abietoideae of Pinaceae, the pine family.The English-language common name "hemlock" arose from a perceived similarity in the smell of its crushed foliage to that of the unrelated plant hemlock. [4]
An Eastern Hemlock branch at the Kortright Centre for Conservation. Tsuga canadensis, also known as eastern hemlock, [3] eastern hemlock-spruce, [4] or Canadian hemlock, and in the French-speaking regions of Canada as pruche du Canada, is a coniferous tree native to eastern North America. It is the state tree of Pennsylvania. [5]
Tsuga dumosa is a tree growing 20 to 25 m (65 to 80 feet) high and exceptionally to 40 m (130 feet). The diameter at breast height is typically 40 to 50 cm (16 to 20 inches), but can be beyond 100 cm (40 inches). [3] The crown on small trees is ovoid and their form is like that of pendulous bushes.
The mid-Holocene hemlock decline was an abrupt decrease in Eastern Hemlock (Tsuga canadensis) populations noticeable in fossil pollen records across the tree's range. [1] It has been estimated to have occurred approximately 5,500 calibrated radiocarbon years before 1950 AD. [2] The decline has been linked to insect activity [1] [3] and to ...
Carolina hemlock is used more often as an ornamental tree than for timber production, due to its overall rarity. [9] In landscaping, it is similar in appearance to eastern hemlock, but the Carolina hemlock has a deep taproot, compared with the shallow, aggressive roots of eastern hemlock. This means shrubs and other plants can be grown more ...
Tsuga diversifolia, commonly known as northern Japanese hemlock, is a species of conifer native to the Japanese islands of Honshū, Kyūshū, and Shikoku.In Europe and North America, the species is sometimes employed as tree for the garden and has been in cultivation since 1861.