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No. 1j. 



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No. 13. 



ASCLEPIAS TUBEROSA. 



English Name— ORANGE SWALLO\V-W0RT, 



French Name — Houatte Tubereuse. 



German Name — Knollige Schwalbenwurz. 



Officinal Name — A. tuberosa radix. 



Vulgar Names — Pleurisy root, Butterfly weed, 

 Flux root, Wind root, White root, Silk weed, Canada 

 root, &:c. 



Ai^THORiTiES — Linnaeus, Schoepf, Michaux,Pursh, 

 B. Barton, Chapman, Thacher, Dispensaries, Parker, 

 TuHy, Bigelow, Med. Bot. fig. 26 & Seq. W. Bar- 

 ton M. Med, fig, £2, &c. 



Genus Asclepias — Calix quinquefid. Corolla five 

 parted, flat or retiexed, bearing five auricles with ap- 

 pendages, and a large central truncate stegyne, sup- 

 porting and concealing the five stamina, covering the 

 two pistils : which are succeeded by two follicles. 



Species A. Tuberosa — Hairy, leaves scattered, 



variable, nearly sessile, oblong or lanceolate, entire : 



umbels with subulate bracts, flowers lax and orange 

 color. 



DESCRIPTION—Root perennial, large, fleshy, 

 white, of variable form, fusiform, crooked or brancb- 

 ed-^Many stems either erect or ascending oi pro- 

 cumbent, round, hairy, green or red— Leaves scat- 

 tered, sessile, or on short petiols, very hairy, pa^« 



