FLOWERING PLANTS AND FERNS OF INDIANA. 587 



Buckeye. (Aesculus glabra Willd.) 



Spotted St. John's- wort. (Hypericum macidatum Walt.) 



Cowbane. I Oxypolu rigidis (L.) BrittoD.) 



Water parsnip. (Slum cicuUrfolium Gmel.j 



Pimpernel. (Anagallis arvensis L.) 



Potato. (Solarium tuberosum L.) 



Spring cocklebur. (Xanthium spinosum L.) 



Broad cocklebur. (Xanthium Btrumarium L. 



III. PLANTS SUSPECTED OF BEING POISONOUS TO STOCK. 



Field horsetail. (Equisetum arvense L.) 



Crow poison. (Nothoscordum bivalve (L.) Britton. 



Oak. (Quercus various species.) 



Sleepy catchfly. (Silene antirrhina L.) 



May apple. (Podophyllum peltatum L.) 



Trailing arbutus. (Epigaia repens L.) 



Spreading dogbane. (Apocynum androscemifolium L.) 



Indian hemp. (Apocynum cannabinum L. ) 



Butterfly weed. Pleurisy weed. (Asclepias tuberosa L.) 



Bittersweet. (Solarium didcamara L.) 



Slender gerardia. (Gerardia tenuifolia Vahl.) 



Hedge hyssop. (Gratiola officinalis L.) 



Common lousewort. (Pedicularis Canadensis L. ) 



Indian tobacco. (Lobelia inflata L.) 



Brook lobelia. ( Lobelia Kalmii L.) 



Pale-spiked lobelia. (Lobelia spicata Lam.) 



Great lobelia. (Lobelia syphilitica L. 



Golden rod. (Solidago various species. ) 



American cocklebur. (Xanthium Canadense Mill.) 



Concerning the poisonous properties of the plants in the first list 

 there is no question; concerning those in lists two and three there is a 

 need of further observation, which can only be furnished by stock- 

 owners. Self interest would seem to be a sufficient motive to inaugu- 

 rate a careful study of these suspected plants. 



WEEDS. 



From the standpoint of economics, perhaps the most interesting 

 botanical question is that which touches the control of weeds. It is 

 a problem, the terms of which are constantly changing as conditions 

 change, and one which will probably never be satisfactorily settled. 

 It can, however, be made a much less serious matter by the exercise 



