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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]
The Ecological regions of Quebec are regions with specific types of vegetation and climates as defined by the Quebec Ministry of Forests, Wildlife and Parks. Given the size of this huge province, there is wide variation from the temperate deciduous forests of the southwest to the arctic tundra of the extreme north.
Taxus canadensis, the Canada yew [2] or Canadian yew, is a conifer native to central and eastern North America, thriving in swampy woods, ravines, riverbanks and on lake shores. Locally called simply as "yew", this species is also referred to as American yew or ground-hemlock.
A growing season of 94 days above that temperature is required for tree growth. [12] Because of climate change, which leads to earlier snow melt and favorable conditions for tree establishment, the tree line in North Cascades National Park has risen more than 400 feet (120 m) in 50 years. [13]
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]
It can grow as a vine or shrub and can be identified by its smooth green leaves in clusters of three. In the spring, it will produce greenish-white flowers and in the fall, white berries.
Poison hemlock has umbrella-shaped clusters of white flowers with fern-like leaves. Distinguishing features include its height - six to 10 feet tall - and that they have red spotting on the stem.
Subzones may be divided into variants, each of which is denoted by a number. For example, the numerous variants of the Interior Cedar—Hemlock moist warm subzone are designated as ICHmw1, ICHmw2, etc. A variant may be divided into phases, such as ICHmc1a, the amabilis fir phase of the Interior Cedar—Hemlock moist cold subzone.