8 MISC. PUBLICATION 77, U. S. DEPT. OF AGRICULTURE 



ARBORVITAE 



Thuja occidentalis L. (Fig. 9.) 



Other common names. — White cedar, yellow cedar, featherleaf cedar. 



Habitat and range. — Arborvitae is found in wet ground and along streams 

 from Canada south to North Carolina and Tennessee and west to Minnesota and 

 Manitoba. 



Description. — This evergreen tree, which reaches a height of 70 feet and a 

 trunk diameter of 5 feet, needs no special description, as few people within its 

 range are unfamiliar with its flat scalelike leaves and small cones from one-third 

 to one-half inch long. The old bark is shed each year in long, ragged strips. 



Part used. — The leaves and branchlets. In limited demand onlv. 



Figure 9.— Arborvitae (Thuja occidentalis) 



Figure 10.— Balm (Melissa officinalis) 



BALM 



Melissa officinalis L. (Fig. 10.) 



Other common names. — Lemon balm, garden balm, pimentary, goose tongue, 

 honey plant, sweet-mary, lemon lobelia. 



Habitat and range. — Balm is found sparingly in waste places, thickets, and 

 woods from Maine to Georgia, Missouri, and" Arkansas, also in Oregon and 

 California. 



Description. — This plant is 1 to 2^ feet high, is covered with fine hair, and has 

 a rather stout, erect, or much-branched stem. The round-toothed, egg-shaped, 

 or heart-shaped leaves are from 1 to 2}{ inches long and arranged opposite one 

 another on the stem. From June to August the white or cream-colored tube- 

 shaped flowers up to two-thirds of an inch long appear, several to a cluster, in the 

 axils of the leaves. The plant is lemon scented. 



Part used. — The herb. In limited demand only. 



