332 OHIO EXPERIMENT STATION: BULLETIN 175. 



Seeds oblong", about 1-20 inch long - , as shown in seed cut. This weed requires 

 drastic measures where it prevails. In oat fields it is to be destro} ed b}' blue- 

 stone spraying - like charlock. 



154 Hare's=ear Mustard (A) *Conringia oriental 'is (L.)Dumort. This is 

 a low plant and has rather large, oval, fleshy leaves which suggest the name. 

 It has been found within the state and may attract local notice. Seeds rather 

 large, elongated, 1-10 inch long and as shown in seed cuts. 



155 Alyssum (A) *Alyssum alyssoides (L.) Gouan. In this we have another 

 low, hairy, European mustard with narrow leaves broadened toward the end, 

 and small pods resembling those of peppergrass. It has been introduced into 

 Ohio in crimson clover seed. 



Seeds light brown, lens-shaped, oval, 1-16 inch long, resembling somewhat 

 those of peppergrass, but smaller. It requires the same methods of destruction 

 as the other annual mustards. 



CAPER FAMILY, CAPPARIDACE^E. 



156 Polanisia, Clammy=weed (A) * Polanisia graveolens Raf. Polanisia is 

 a low growing annual with unpleasant smell and sticky-hairy leaves and stem. 

 Most abundant along the gravel-ballasted railways. It may readily be destroyed 

 by hoeing or uprooting. 



ORPINE FAMILY, CRASSULACE^E. 



157 Live=for=ever, Garden Orpine (P)*Sedum Telephium L. This cultivated 

 plant, with its stout stems two feet high and oval, blunt, thick leaves is common 

 in gardens. Escaped to the fields its numerous thick tuber-like rootstocks make 

 it the worst of pests. So tenacious of life is this plant that the stems readily 

 strike root and extreme measures are needed ior its destruction. In some cases 

 fields are overrun with live-for-ever. The pest appears to be spread exclusively 

 by the root. 



Weeds of this character require the most severe measures for their destruc- 

 tion. The cutting and salting or use of sulfuric acid as mentioned for Canada 

 thistle will destroy them. Recently, Mr. M. E. Merchant of Guilford, New 

 York, has been sending out diseased live-for-ever plants. In them the leaves 

 have dropped off and the thick rootstocks have begun to decay. They are 

 recommended to be planted about in the patches of this weed, thence the disease 

 is said to spread to the healthy plants. The nature of the disease and the 

 success of the method are not sufficiently known to warrant recommendation. 

 This, however, may prove a useful means of destroying live-for-ever, although 

 it failed to yield decisive results with the writer. 



158 Love=in=tangle, Mossy Stonecrop (P) *Sedum acre L. This is a 

 spreading, moss-like plant with bright yellow flowers, common in cultivation. 

 It has escaped in many localities and one case of severe poisoning from eating 

 it is reported. It should be thoroughly destroyed where found. 



ROSE FAMILY, ROSACEA. 



159 Running brier, Dewberry (P) Rubus procumbcns Muhl. The dew- 

 berry, with its long, trailing stems, is frequent in dry fields, especially to the 

 southward. It ranks with the next and requires the same treatment. 



160 Common Brier, Blackberry (P) Rubus nigrobaccus Baily. The common 

 bramble needs no description for its identification. It is present everywhere by 

 waysides and in fence rows and appears to be doing its utmost to lead farmers 

 to recognize their own interests in abandoning fences as far as possible. It 

 also infests many fields to their great damage. The thrifty growing blackberries 

 produce an abundance of luscious fruit and where desired for fruit are valuable. 



