PLANTS OF BHODE ISLAND. 23 



3. Balsam it a, L., var. tanacetoides, Boiss. Balm. 



Estal»lished! 



TANACETUM, L. Tansy. 

 vulgare, L. 



var. crispum. Quidnessett. 



ARTEMISIA, L. WoKMwooD. 



1. caudata, Michx. 



2. vulgaris, L. Mugwort. 



3. Absinthium, L. Wormwood. 



4. biennis, L. Providence, Prof. Bailey. 



TUSSILAGO, Touni. Colts Foot. 

 Parfara, L. Smithfield, Cranston, Bennett. 



SENECIO, L. Groundsel. 



1. aureus, L. Squaw-Weed. 



var. oboyatus, T. & G. 

 var. Balsamita3, T. & G. 



2. vulgaris, L. 



3. viscosus,L. Providence, &c. 



CACALIA, L. Indian Plantain. 

 suaveolens, L. Providence, &c. Not common, 



ERECHTHITES, Raf. Fire- Weed. 

 hieracifolia, Puaf. 



ARCTIUM, L. Burdock. 

 Lappa, L. 



Lappa officinalis, Allioni. 

 var. m a j u s . 

 var. minus. Wanskuck; Burrillville. Dr. Bobbins. 



C N I C U S , L. (Touni.) Thistle. 



1. arvensis, Hoffm. Canada Thistle. 



Cirsium arvense, Scap. 



2. lanceolatus, Hoffm. 



Cirsium lanceolatiim, Scap. 



3. horridulus, Pursh. Yellow Thistle. 



Cirsium horridulum, Michx. 



4. pumilus, Torr. Pasture Thistle. 



Corslurn pumilum, Spreng. 



5. altissimus, Willd. 



Cirsium altisslmum, Spreng. 

 var. discolor. 



Cirsium discolor, Gray. 



6. muticus, Pursh. Swamp Thistle. 



Cirsium muticum, Michx. 



