Reimer, of Oregon, found this species to be very resistant to fire-blight and at first thought it might prove to be a valuable stock. Following Reimer's experiments much was said of it as a promising new stock, and the United States Department of Agriculture gave it a thorough trial from the results of which they discouraged its use. The tree proved to be a slow grower; very subject to leaf-blight, therefore unable to hold its leaves during the growing and budding season, difficult to use in budding as the tough bark did not "slip" easily, and but a small number of the buds took. According to Galloway,[17] however, the Kuan li or Chinese water pear, which he says belongs to the Ussuriensis group, is one of the most promising pear stocks. Both for its fruits and as a stock, this species is likely to receive much attention in the United States for some time to come. The difficulty at present, as we have found at this Station, is to get seeds or budding wood true to name of the forms of the species that seem to be most desirable. 6. =PYRUS SERRULATA= Rehder =1.= _P. serrulata_ Rehder _Proc. Amer. Acad. Arts & Sci._ =50=:234. 1915. Chinese Saw-leafed Pear. This species, according to Rehder, is closely related to _P. serotina_ but differs from it chiefly in its serrulate, not setosely serrate, generally broader, leaves, in the smaller flowers with usually three or four styles, and in the shorter sepals and smaller fruit. This pear was first found by E. H. Wilson in 1907 in western Hupeh. The province of Hupeh is 800 or 900 miles west and south of Shanghai. The pears in this location grow in thickets at an altitude of 4000 to 5000 feet. Reimer found the species at Ichang, in Hupeh, at elevations of 3000 to 3700 feet. Its occurrence at these altitudes indicates that it is a hardy form. Whether the species is likely to be valuable for its fruits, or for hybridization, does not appear, but Galloway,[17] reporting on it as tested by the United States Department of Agriculture, says that it is affected but slightly by leaf-blight, holds its foliage well in hot summers, and has a long budding season. These statements indicate that it is worth trying as a stock. [Illustration: _PYRUS BETULAEFOLIA_] =7.= =PYRUS BETULÆFOLIA= Bunge =1.= _P. betulæfolia_ Bunge _Mem. Sav. Etr. Acad. Sci. St. Petersb._ =2=:101. 1833. =2.= Decaisne _Jard. Fruit._ =1=:20. 1872. =3.= Carrière _Rev. Hort._ 318. 1879. figs. 68, 69. =4.= Sargent _Gard. & For_. =7=:224. 1894. fig. 39.