ARUM TRIPHYLLUM ASTHMA-WEED, QUEENSLAND. 13 



Arum triphyllum L. Same as Arisaema triphyllum, 



Asarum canadense L. Birthwort family ( Aristolochiaceae ) . 



Canada snakeroot; wild ginger; Indian ginger. 



Perennial herb, about 1 foot in height, native in rich woods from Canada to 

 North Carolina and Kansas. 



Parts used. — Rhizome and rootlets (nonofficial). 

 Asclepias. See Asclepias tuber osa. 

 Asclepias cornuti Dec. Same as Asclepias syriaca. 

 Asclepias incarnata L. Milkweed family (Asclepiadaceae). 



White Indian hemp; swamp-milkweed; swamp-silkweed; rose-colored silkweed. 



Perennial herb, 2 to 4 feet high, native in swamps from Canada to Tennessee and 

 Kansas. 



Part used. — Root (nonofficial) . 

 Asclepias syriaca L. Milkweed family (Asclepiadaceae). 



Synonym. — Asclepias cornuti Dec. 



Common milkweed; silkweed. 



Perennial herb, 3 to 5 feet high, native in fields and waste places from Canada 

 to North Carolina and Kansas. 



Part used. — Root (nonofficial). 

 Asclepias tuberosa L. Milkweed family (Asclepiadaceae). 



Asclepias; pleurisy-root; butterfly-weed; Canada-root; whiteroot. 



Native, perennial herb, 1 to 2 feet high, growing in dry fields from Canada to 

 Florida and Arizona; most abundant southward. 



Part used.— -Root (official in U. S. P. 1890). 

 Ash, American mountain-. See Sorbus americana. 

 Ash, black. See Fraxinus nigra. 

 Ash, cane-. See Fraxinus americana. 

 Ash, hoop-. See Fraxinus nigra. 



Ash, prickly. See Fagara clava-her culls and Xanthoxylum americanum. 

 Ash, wafer-. See Ptelea trifoliata. 

 Ash, white. See Fraxinus americana. 

 Asimina triloba (L. ) Dunal. Custard-apple family (Anonaceae). 



North American pawpaw; custard-apple. 



Small, native tree, growing in rich soil along the banks of streams from New 

 York to Michigan and southward. Most common in the Ohio Valley. 



Part used. — Seed (nonofficial). 

 Aspen, American. See Populus tremuloides. 

 Aspen, quaking. See Populus tremuloides. 

 Aspidium. See Dryopteris filix-mas and P>. marginalis. 

 Aspidium filix-mas Sw. Same as Dryopteris filix-mas. 

 Aspidium marginale Sw. Same as Dryopteris marginalis. 

 Asplenium filix-foemina ( L. ) Bernh. Same as Athyrium filix-foemina. 

 Aster puniceus L. Aster family ( Asteraceae ) . 



Red-stalked aster; cocash; meadow-scabish. 



Perennial herb, with stout, reddish stem, 3 to 8 feet high, native; in swamps 

 and on banks of streams, Nova Scotia to Minnesota, south to North Carolina, 

 Ohio, and Michigan. 



Pari used. — Root (nonofficial). 

 Aster, red-stalked. See Aster puniceus. 

 Asthma-weed, Queensland. See Euphorbia pilulifera. 



