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DESCRIPTION OF MEDICINAL PLANTS. 
Tsuga Canadensis, Carr. Hemlock. A tall tree with light and 
spreading spray and delicate foliage, bright green above and 
silvery beneath. Leaves petioled, short-linear, obtuse IP 
long, sattered, flat, appearing 2-ranked. Fertile catkins and 
cone on the end of last year’s branchlets ; cones oval, 6-8" 
long of few thin scales, much longer than the bracts, maturing 
the first year. Cumberland Mountains and mountains of 
East Tennessee. The prepared resinous exudation. Pix Can- 
adensis U. S. Ph. The bark, Hemlock bark. The volatile 
oil obtained by distillation of the twigs gives the oil of Hem- 
lock. 
Juniperus Virginiana, L. Red Cedar. Growing to a height of 
60-90°, pyramidal in form ; evergreen leaves mostly oppo- 
site, of two forms, i. e., awl-shaped and loose, and scale- 
shaped, appressed, imbricated and crowded, the latter with a 
resiniferous gland on the back; scale-like leaves obtuse or 
acutish, entire. Flowers dioecious or occasionally monoecious, 
in very small lateral catkins. Anther-cells 3-6, attached to 
the lower edge of the shield-shaped scale. Fertile catkins 
ovoid, of 3-6 fleshy, coalescent scales, each 1-ovuled in fruit 
forming a sort of berry, which is scaly bracted underneath, 
bluish-black with white bloom. Very frequent in Middle 
Tennessee, where the cedars form nearly exclusive forests or 
stands, in the siluriau limestone region, known as cedar- 
glades. A volatile oil is obtained by distillation of tops. 
Oleum Juniperi Virginian®, oil of Red Cedar. 
Class II. MONOCOTYLEDONOUS OR EXOGENOUS 
PLANTS. 
ORCHID ACE 2E. (Orchis Family). 
Corallorhiza odontorhiza, Haller. Coral-root. A light brown 
or purplish plant ; stem slender, bulbous-thickened at the 
base, 6-16' high, 6-20 flowered. Flower irregular, some- 
what ringent, oblique and gibbous, small spur adnate to the 
summit of the ovary. Perianth about 3" long; lip entire 
or merely denticulate, thin, broadly ovate or obovate, ab- 
