m 



OHIO EXPERIMENT STATION: BULLETIN 175. 



The seeds of the common roses are straw color to brown, angular, 1-8 to 

 3-16 inch long. The seeds of a western species, together with the globular 

 rose-hips containing them, are frequent in western oats. Such impure seeds 

 should be rejected. Wild roses are destroyed by grubbing and cutting after 

 the manner of briers and brush. 



APPLE FAMILY, POMACES. 



168 Thorn, Haw (P) Cratcegus spp. Species of wild thorn or haw are 

 often a menace in borders and pastures. These harbor the cluster-cup stages 

 of many rusts, and while ornamental in a way, are objectionable as pasture 

 invaders. Removed by grubbing. 



PLUM FAMILY, DRUPACE^. 



169 Peach (P) *Amygdalus Persica L. In southeastern Ohio there is no 

 more frequent roadside pest than seedling peach trees that spring from cast-off 

 pits. These become affected with yellows and spread the contagion to orchards. 

 They should be persistently grubbed out. 



SENNA FAMILY, CAESALPINACE^E. 



170 Partridge Pea (A) Cassia Chamce crista L, 

 This is a low, spreading plant, about one foot in height 

 with rather large, showy, yellow flowers and leaves 

 closing at the touch, Fig. 30. While pretty to look upon 

 it is capable of becoming a serious pest in dry or sandy 

 soils. It is more common southward than in Ohio, but 

 occurs over the whole state. Being an annual, this 

 plant s^eds very freely and should be destroyed by 

 cutting or by cultivation before the seeds mature. 



171 Wild Senna (P) Cassia Maiylandica L. With 

 its tall stems, three or four feet high, numerous leaflets 

 and abundant, curved pods, two or three inches long, 

 wild senna is a conspicuous weed. Its deep, perennial 

 root makes it a persistent offender in the rich hillside, 

 pasture lands of southeastern Ohio. See Fig. 31. 



Seeds hard, gray, elongated, 3-16 inch long and 

 half as wide, with smooth, shining coat, much resem- 

 bling grains of wheat in size but flattened. The occur- 

 rence of this weed in permanent pastures makes it 

 difficult to destroy. Cutting with the scythe before the 

 plants come into blossom, if repeated during the season, 

 ought soon to kill much of it. Where limited in quantity Fig. 30. Partridg-e Pea. 

 the use of the hoe and salt might be even better, since the salt invites the 

 stock to complete the work of the hoe. 



PEA P^AMILY, PAPILIONACE^E. 



The pulse or pea family is a most valuable one for the agriculturist. To it 

 belong the peas, beans, lentils and lupines, as well as the many clovers so 

 valuable both for forage and for restoring fertility to the soil. These plants, 



