50 AVILD MEDICINAL PLANTS OF THE UNITED STATES. 



Nyssa ogeche .Marsh. Dogwood family (Cornaceae). 



Sli7ioni/))i. — Xt/ssa capitata Walt. 

 Sour tupelo; Ogeechee lime. 



A .small tree, growino; in swamps near the seacoast from southern South Caro- 

 lina to Florida. 

 Part used. — Root wood (nonofficial). 



Ny><s<i II II Word A'S'^ang. Same as Nyssa aquatica. 



Oak, cliampion-. See Quercus rubra. 



Oak, Jerusalem. See Chenopodiuni, ardltebninticuni and ' '. Iiotnjs. 



Oak, poison-. See Rhus radicals nnd /'. toxicodendron. 



Oak, red. See Quercus rubra. 



Oak, Spanish. See Quercus rubra. 



Oak, stone-. See Quercus alba. 



Oak, white. See Quercus alba. 



Oenothera biennis L. Evening-primrose family ( Onagraceae ) . 



Synonym. — Onagra biennis (L. ) Scop. 



Evening-primrose; tree-primrose; night willow-herl». 



Annual or biennial plant, 2 to 5 feet high, common in lields and waste places 

 from Labrador to Florida, west to the Rocky Mountains. Native. 



Part used. — Plant (nonofficial) . 

 Old-man' s-beard. See Chionanthus virginica. 

 Olive, spurge-. See Daphne mezereum. 

 Onagra biennis (L. ) Scop. Same as Oenothera biennis. 

 Onosmodium virginianum (L.) DC. Borage family (Boraginaceae). 



Synonym. — Lithospermum virginianum L. 



Virginia false gromwell; gravel-weed; necklace-weed; pearl-i^lant; wild Job's- 

 tears. 



Rough-hairy, native, perennial herb, 1 to 2 feet high; in dry, hilly grounds 

 from the New England States to Florida, Kansas, and Texas. 



Parts used. — Root and seeds (nonofficial ). 

 Opium, wild. See Lactuca canadensis. 

 Orangeroot. See Hydrastis canadensis. 

 Orobanche virginiana L. Same as Leptamnium virginianum. 

 Osier, golden. See Myrica gale. 

 Osier, green. See Cornus drcinaia. 

 Osier, red. See Cornus amomum. 



Osmorrhiza longistylis DC. Same as Washingtonia longistylis. 

 Osmunda regalis L. Royal fern family ( Osmundaceae) . 



Royal fern; Ijuckhorn-brake. 



A tall, native fern, with fronds 3 to 4 feet high, occurring in swamps and marshes 

 from Canada to Florida and Mississippi. 



Part used. — Rhizome (nonofficial). 

 Ostrya virginiana (Mill.) Willd. Birch family (Betulaceae). 



Hop-hornbeam; ironwood; deerwood; leverwood. 



Native tree, 25 to 30 feet in height, growing in rich woods, Canada and eastern 

 United States. 



Part used. — Bark (nonofficial). 



