KHUS TOXICODENDRON RUlil's OCCIDKNTAL1S, 5*,) 



Rhus toxicodendron L. Sumac family ( Anacardiaceae) . 



Poison-ivy; poison-oak. 



Low, erect, and finely pubescent plant, more shrubby than Rhus radicam, and 

 found in dry soil in more southern localities from Virginia to Georgia. Very 



poisonous to the touch. 



Pari used.— Fresh leaves, collected with those of Rhus radicam. 

 Richweed. See CoUinsonm canadensis and Eupatorium agerat&ides. 



Robinia pseudacacia L. - Pea family (Fabaceae) . 



Locust-tree; black locust; yellow locust; false acacia. 



A large, indigenous tree, sometimes 80 feel in height, growing in woods from 



Pennsylvania south along the western slope of the Allegheny Mountains to 

 Georgia, west to the Indian Territory. Most abundant in the Middle and 

 Eastern States. 



Part used. — Bark of root (nonofficial). 

 Robin's-rye, See Pobjtrivlmm juniperinurn. 



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Rock-brake. See Pdypodhm vulgare. 



Rock-rose, Canadian, See Helkmthemum canademe. 



Rope-bark. See Dirca palutfn . 



Rose, Canadian rock-. See HeHcmthemum canademe* 

 Rose-bay. See Rhododendron maximum . 

 Rose-iaureL See Rhododendron maximum. 

 Rosemary, marsh-. See Idm&nium carolinianum* 

 Rose-pink. See Sabbatia angtUaris. 

 Rose-willow. See Cornus amomum. 

 Rosinweed. See Silphium laciniatum. 



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Roundwood. See Sorbus americana. 



Rubus. See Rubus cuneifolms, R. nigrobaceus, JR. procumbens, R. trurialis, and R. 

 \nllosus. 



Rubus canadensis T. & G., not L. Same as Rubus procumbens. 



Rubus cuneifolius Purs h. Rose family (Rosaceae). 



Rubus; sand-blackberry; knee-high blackberry. 



Shrubby plant, 1 to 3 feet high; in sandy soil from Connecticut to Florida, 

 west to Missouri and Louisiana. 



Pari used. — Bark of rhizome (official). 

 Rubus idaeus var. Qmerieanw Torr. Same as Rubus oacidentalis. 



Rubus nigrobaccus Bailey. 



Synonym. — Ruin* viUosus A. Gray, not Ait. 



(R 



Rubus; high-bush blackberry. 



Slender shrub, 3 to 7 feet high, growing in dry fields and along roadsides, Now 

 England States to Florida, and west to Arkansas. 



Pari used, — Bark of rhizome (official). 



Rubus occidentals L. 



Syt ym. — Rubus idaeus var. americanus Torr. 



family 



Black raspberry; thimbleberry; blackcap. 



L straggling shrub, growing along the borders of woods and 

 from Canada south to Gi rgia and Missouri. 



Parts i d. — Fruit and leaves (nonofficial) . 



