417 



Quercus imbricaria, Mx. Shingle oak. Laurel oak. 



macrocarpa, Linn. Over-cup oak. Burr oak. 



rubra, Linn. Red oak. 

 Queria canadensis, Linn. Forked chickweed. 



R. 



Ranunculus abortivus, Linn. 



acris, Linn. Crowfoot. Buttercup. 



aquatilis, Linn. Water crowfoot. 



fascicularis, Muhl. 



lacustris, Beck and Tracy. Lake crowfoot. 



pennsylvanicus, Linn. 



recurvatus, Poiret. 



repens, Linn. 



sceleratus, Linn. Celery crowfoot. 

 Rensselaeria virginica, Beck. Water arum. 

 Rhamnus franguloideus, Mx. Dwarf alder. 

 Rhus copallina, Linn. Mountain sumach. 



glabra, Linn. Sleek sumach. 



radicans, Linn. Poison ivy. 



toxicodendron, Linn. Poison ash. 



typhina, Linn. Sumach. 



venenata, D. C. Poison elder. Poison sumach, 

 Rhynchospora alba, Vahl. 



glomerata, Vahl. False bog rush. 

 Ribes floridum, L'Heritier. Wild black currant. 



gracile, Mx. 



triflorum, Ww. Wild gooseberry. 

 Rochelia lappula, R. and S. 



virginiana, R. and S. 

 Rosa Carolina, Linn. Swamp rose. 



parviflora, Ehrhart. Wild rose. 

 Rubus frondosus, Bw. Leafy raspberry. 



occidentalis, Linn. Thimbleberry. Black raspberry. 



saxatilis, Mx. 



trivialis, Mx. Creeping blackberry. Dewberry. 



villosus, Aiton. High blackberry. 



53 



