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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 (/ 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 poison hemlock.
Tsuga heterophylla, the western hemlock[ 2] or western hemlock-spruce, [ 3] is a species of hemlock native to the west 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 mertensiana is a large evergreen conifer growing up to 20 to 40 metres (66 to 131 feet) tall, with exceptional specimens as tall as 59 m (194 ft) tall. They have a trunk diameter of up to 2 m ( 61⁄2 ft). The bark is about 3 centimetres ( 11⁄4 inches) thick and square-cracked or furrowed, and purplish-brown [ 3] to gray in color.
This page was last edited on 12 December 2015, at 18:35 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike License 4.0; additional terms may apply.
closeup. Adelges tsugae, the hemlock woolly adelgid ( / əˈdɛl.dʒɪd / [ 1]) or HWA, is an insect of the order Hemiptera (true bugs) native to East Asia. It feeds by sucking sap from hemlock and spruce trees ( Tsuga spp.; Picea spp.). In its native range, HWA is not a serious pest because populations are managed by natural predators and ...
Ramsey's Draft Wilderness is located between the crests of Shenandoah Mountain and Bald Ridge, north of U.S. Route 250 and approximately 20 miles (32 km) west of Staunton, Virginia. A rugged and steep piece of land, Ramsey's Draft Wilderness ranges in elevation from 1,600 feet (488 m) to 4,282 feet (1,305 m) at Hardscrabble Knob.
Mid-Holocene hemlock decline. Modern range of Tsuga canadensis. 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]
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