PLANTS OF MONROE COUNTY. 67 



exception of a few small plants growing in the conifer collection in 

 the public parks. It is a matter of much surprise for many horticul- 

 turists to see this beautiful tree doing so well so far north. It is 

 native from Oregon to California. 



Juglans regia Linn., the Persian Walnut, commonly known 

 under the name of English Walnut, has been considerably planted 

 in the city and vicinity, and it bears crops of nuts quite freely. The 

 largest individual tree in Rochester and vicinity grOws in the village 

 of Greece, on the Ridge Road, and on the side of the road. The 

 circumference is 7.6 feet, and the height 45 feet. An interesting 

 hybrid walnut grows at No. 1210 Culver Road, at the home of Miss 

 Mary A. Booth. Her father, the late Dr. C. M. Booth, procured a 

 nut from a Persian Walnut tree, growing at that time at the east 

 end of ( uirson Avenue, and planted it at the rear of his house, about 

 forty years ago. When this tree began to bear nuts it was observed 

 they differed from the parent considerably. It was further noticed 

 that the leaves, buds and bark of the tree were intermediate between 

 the Butternut and English Walnut, and it consequently proved to 

 be a hybrid between the two. This was explained by the proximity 

 of a Butternut to the Persian Walnut from which Dr. Booth pro- 

 cured the nut. By a mere accident Dr. Booth happened to take the 

 nut in which the pistil of the flower had been cross pollinated by the 

 Butternut. The girth is 8.5 feet, the height 50 feet, and the spread 

 of branches 75 feet. An orchard of Persian Walnuts, consisting 

 of about eight acres, has been established on the farm of P. S. 

 Thompson, East Avon, and was planted thirty-one years since. This 

 orchard has received considerable attention from the Bureau of 

 Plant Industry, Washington, D. C. 



Populus nigra variety betulifolia Torr. is a poplar of much in- 

 terest. Michaux found this poplar growing on the banks of the 

 Hudson River and believing it to be a native American poplar, gave 

 it the name of Populus Hudsonica. Pursh again found it growing in 

 1814 somewhere on the shores of Lake Ontario, and named it Popu- 

 lus betulifolia. The date of its introduction from Europe is unknown, 

 but it is known to be a form of Populus nigra Linn. It does not 

 seem to have perpetuated itself to any extent in this country, and 

 the large individual in front of the Rochester Trade School at Ex- 



