42 WILD MEDICINAL PLANTS OF THE UNITED STATES. 



Larix laricina (Du Roi) Koch. Pine family (Pinaceae). 



Synonym. — Larix americana Michx. 



Tamarack; American larch; hackmatack; black larch. 



A tall, slender tree, native in swampy woods and moist places from Canada 

 south to New Jersey, Indiana, and Minnesota. 



Part used. — Bark (nonomcial). 

 Lark-heel. See Delphinium consolida. 

 Larkspur, field-. See Delphinium consolida. 

 Larkspur, tall. See under Delphinium consolida. 

 Laurel, broad-leaved. See Kalmia latifolia. 

 Laurel, deer-. See Rhododendron maximum. 

 Laurel, great. See Rhododendron maximum. 

 Laurel, mountain-. See Kalmia latifolia. 

 Laurel, narrow-leaved. See Kalmia angustifolia. 

 Laurel, rose-. See Rhododendron maximum. 

 Laurel, sheep-. See Kalmia angustifolia and K latifolia. 

 Laurel, spurge-. See Daphne mezereum. 

 Laurel, swamp-. See Magnolia virginiana. 

 Laurus benzoin L. Same as Benzoin benzoin. 

 Lavender, sea-. See Limonium carolinianum. 

 Leafcup, yellow. See Polymnia uvedalia. 

 Leatherwood. See Dirca palustris. 

 Ledum groenlandicum Oeder. Heath, family (Ericaceae). 



Synonym. — Ledum latifolium Ait. 



Labrador tea; continental tea; Jauies-tea. 



Evergreen shrub, 1 to 4 feet high, native in cold bogs and damp mountain 

 woods, northern part of the United States and in Canada. 



Part used. — Leaves (nonomcial). 

 Ledum latifolium Ait. Same as Ledum groenlandicum. 

 Lemon, wild. See Podophyllum peltatum. 

 Lemon-balm. See Melissa officinalis. 

 L.eonurus cardiaca L. Mint family (Menthaceae). 



Motherwort; lion's-tail; throw wort. 



Perennial plant, 2 to 5 feet high, naturalized from Europe, and occurring in 

 fields and waste places from Nova Scotia to North Carolina westward to 

 Nebraska. 



Part used. — Herb (nonomcial). 

 Leptamnium virginianum (L. ) Raf. Broomrape family (Orobanchaceae). 



Synonyms. — Epipliegus virginiana Bart.; Orobanche virginiana L. 



Beechdrops; cancerroot. 



Plant 6 inches to 2 feet in height, parasitic upon the roots of beech trees from 

 New Brunswick to Florida, west to Michigan and Louisiana. 



Part used. — Whole plant (nonomcial). 

 Leptandra. See Veronica virginica. 



Leptandra virginica (L.) Nutt. Same as Veronica virginica. 

 Leptilon canadense (L. ) Britton. Same as Erigeron canadensis. 

 Lettuce, Indian. See Frasera carolinensis. 

 Lettuce, tall. See Lactuca canadensis. 

 Lettuce, wmite. See Nabalus albus and X serpentariu*. 



