Showing posts with label and coughs. Show all posts
Showing posts with label and coughs. Show all posts

Thursday, October 16, 2014

Eastern Hemlock Tree Medicinal Uses

By Liliana Usvat
Blog 243-365

Scientific Name Tsuga canadensis
Favoured: Moist-Wet soil,sand, loam, partial shade to full shade,
Maximum Height: 30 m
Provides food & shelter for wildlife
The eastern hemlock can live for up to 800 years.










Eastern hemlocks (Tsuga canadensis)are shade tolerant and thrive in acidic soils in moist, cool environments (Rooney et al, 2000). They can be found in certain areas across the United States including northern Michigan, New England, New York, and Eastern Canada including most of the maritime provinces and Quebec (Godman & Lancaster, n.d.). Its presence has been noted as diminished in the Great lakes, St-Lawrence and Acadian regions (Fuller 1998). This species has an extremely slow growth rate and individual trees are long-lived. 
Eastern hemlock grows from sea level to about 730 m (2,400 ft) in elevation in the northeastern and northern portions of the range. Most commonly it is found on benches, flats, and swamp borders, provided the peat and muck soils are shallow (Aquic Haplorthods or Aerie Haplaquods). On the Allegheny
Plateau, especially in New York and Pennsylvania, most of the hemlock grows between 300 and 910 m (1,000 and 3,000 ft) (35). In the southern Appalachians the most frequent occurrences are at elevations of 610 to 1520 m (2,000 to 5,000 ft) and often are restricted to north and east slopes, coves, or cool, moist valleys (35). Outliers tend to be severely restricted by a combination of edaphic and climatic factors.

Medicinal Uses
First Nations people also harvested parts of eastern hemlock for traditional medicine. The inner bark was used to make poultice for wounds and the vitamin C rich leaves were used for tea (Nesom, 2012).

Leaves
Twigs with many needles used in tea to treat kidney ailments. Steam from tea used to treat rheumatism, colds, and coughs.

BarkUsed in tea to treat colds, fevers, diarrhea, coughs, and scurvy. Also has astringent properties. Bark poultice used for treating bleeding wounds.

NotesTannins in the twigs and leaves are believed to be responsible for all medicinal effects. Hemlock leaves contain some vitamin C. Bark may also be useful for tanning leather.
Ecological Significance of Eastern Hemlock
The Eastern Hemlock is an important component of the eastern deciduous and mixed forests. Individual trees are long-lived and have impacts on the structure, function and composition of a forest (Fuller 1998). It has effects on the hydrological process within a forest as it has year-round transpiration rates that are highest during the spring (Ford & Vose 2007). This affects the water flow through a forest ecosystem. In the winter months, the canopy of the tree shields the ground below from the snow, and provides a habitat for ruffed grouse, wild turkey and larger browsing fauna such as white-tailed deer.
Seedling Development
Despite the high frequency of cone crops and the long duration of cone production by individual trees, the viability of eastern hemlock seed is usually low. Germinative capacity commonly is less than 25 percent (36). In one locality only 2.1 viable seeds were produced per cone, 2.2 were destroyed by insects, and the remaining 8.0 seeds were empty (29)
Official State Tree of Pennsylvania
The hemlock (Tsunga canadensis) was designated official state tree of Pennsylvania in 1931.