FLOWERING PLANTS. 5 



ARABIS, L. rock cress. 



canadensis, L. sickle-pod. 



rhomboidea, Pers. spring cress. 



laevigata, D. C. tower mustard. 

 ARALIA, L. Bpikenard. 



racemosa, L. 

 ARCHEMORA, D. C. cow-bane ; water dropwort. 



rigida, D. C. 

 ARCTIUM, Linn, burdock. 



lappa, L. common burdock. 

 ARISTOLOCHIA, Tourn. 



serpentaria, L. Virginia snake-root. 

 ARTEMISIA, L. wormwood. 



biennis, Willd. 

 ARUM, L. wake-robin. 



triphyllum, L. Indian turnip. 



dracontium, L. green dragon. 

 ASARUM, Tourn. asarabacca. 



canadense, L. wild ginger. 

 ASCLEPIAS, L. milk-weed ; swailowwort. 



cornuti, Decaisne. common milk-weed; silk weed. 



quadrifolia, Jacq. four-leaved milk-weed. 



tuberosa, L. pleuresy root. 



incarnata, L. swamp milk-weed 



amosna, Mich. 

 ASPIDUIM, Swarlz. shield fern. 



acrosticoides, Willd. 



marginale, Sw. marginal shield fern. 



tenue, Swartz. 

 ASPLENIUM, L. spleenwort, 



rhizophyllum, Willd. walking-leaf fern. 



angustil'olium, Mishx. swamp spleenwort. 



ebeneum, Willd. ebony spleenwort. 



melanocaulon, Willd. 



felix femina, Bernh. 



ASTER, L. 



nova-anglia?, L. 



phlogifolius, Willd. 



cordifolius, L. 



shortii, Boott. 



puniceus, L. 



miser, L. 



prenanthoides, Muhl. 



macrophyllus, L. 

 ASTRAGALUS, L. milk vetch. 



canadensis, L. 



