This species comes from central and western China, where the fruits are used for food under the name, with that of other brown-fruited species, of tang-li. American pomologists are interested in the type species as a possible source of blight-resistant stocks for varieties of the common pear. Stocks of this species, however, grown on the Pacific slope have not proved satisfactory because difficult to bud, and very susceptible to leaf-blight, and because they are not as resistant to pear-blight as an ideal stock should be. Rehder, an authority on oriental pears, gives two botanical varieties. His var. stapfiana differs from the type in bearing pyriform fruits; leaves with less appressed serratures; and petals with attenuate claws. So far as now appears it is of no greater value to pomology than the type. The other botanical variety which Rehder describes, var. culta, is of great importance in pomology and must have detailed consideration.
PYRUS SEROTINA CULTA Rehder
1. Rehder Prod. Amer. Acad. Arts & Sci. 50:233. 1915.
2. P. sinensis Hort. Not Lindley nor Poiret.
3. P. japonica Hort. Not Thunberg.
3. P. sieboldi Carrière Rev. Hort.. 110. 1880.
5. P. sinensis culta Makino Tokyo Bot. Mag. 22:69. 1908.
Tree large, vigorous; top spreading, drooping, open; trunk thick, shaggy; branches stout, zigzag, greenish-brown, with a slight covering of scarf-skin marked with many conspicuous, elongated lenticels; branchlets slender, with long internodes, brownish-red, tinged with green and with thin, ash-gray scarf-skin, glabrous, with many unusually conspicuous, raised lenticels. Leaf-buds sharply pointed, plump, thick at the base, free; leaf-scars prominent. Leaves 4⅛ in. long, 2⅝ in. wide, thick, leathery; apex taper-pointed; margin tipped with very fine reddish-brown glands, finely serrate; petiole thick, 2 in. long, lightly pubescent, greenish-red. Flower-buds thick, short, conical, plump, free, arranged singly on very short spurs; flowers with a disagreeable odor, bloom in mid-season, 1¼ in. across, averaging 7 buds in a cluster; calyx-lobes long, narrow, acuminate, glandular, reflexed, lightly pubescent within and without; petals broadly oval, entire, apex rounded; pistils 4 or 5, from a common base, longer than the stamens, pubescent at base; stamens ¼ in. long, with dull red anthers; pedicels 1½ in. long, slender, thinly pubescent, pale green.
Fruit ripe February-March; 2¼ in. long, 2⅛ in. wide, round, slightly pyriform, irregularly ribbed, with unequal sides; stem 1½ in. long, curved, slender; cavity acute, deep, narrow, furrowed, lipped; calyx deciduous; basin shallow, wide, obtuse, gently furrowed or wrinkled; skin tough, smooth, waxy; color lemon-yellow, with russet lines and nettings and many russet specks; dots numerous, small, conspicuous, brownish-russet; flesh yellowish-white, very granular, crisp, tough, juicy, with a peculiar aroma unlike that of the common pear; poor in quality. Core large, open, axile, with clasping core-lines; calyx-tube short, wide, conical; seeds roundish, of medium size, wide, plump, obtuse.
The Sand pear differs from the type in fruit and foliage. The pears are much larger and are commonly apple-form as shown in the accompanying plate, but trees bearing pyriform fruits are not unknown. The leaves are larger and broader. Rehder, who separated this form from its species, writes, “The Japanese pear cultivated under the name Madame Von Siebold may be considered as representing the type of this variety.” These pears are known to pomologists under several names; as Chinese Sand, Sand, Japanese, Hawaii, Sha Lea, Gold Dust, Mikado, and Diamyo, although it is possible that the last three are hybrids. The pear illustrated and described in this text as a representative of this botanical variety came from seed sent from Manchuria.
The pears are attractive in appearance, keep well, and are palatable in culinary preparations, but are possessed of a gritty flesh and potato-like flavor which debar them as dessert fruits in all regions where the common pear can be grown. The several varieties of var. culta now in America came from Japan where the species must have been early introduced from China as this is now the most common fruit of the Japanese with the exception of the persimmon. In China and Japan there are a number of pomological varieties, which, however, differ from each other less than varieties of the European pear. The fruits of the several varieties grown in America are often mistaken for apples, from which they are distinguished by their deciduous calyxes, rough, dry skins, long stems, juicy, gritty flesh, and insipid potato-like flavor. Seedlings of var. culta fail as stocks for European varieties in the same characters in which the species is unsatisfactory.
This oriental pear hybridizes freely with the common pear, and it is for this purpose that it is most valuable in America. Several of these hybrids are important commercial varieties in North America of which Kieffer, Le Conte, and Garber, in the order named, are the best known and the most useful. Sterility is a common attribute of hybrids, but the hybrids between these two species are not more sterile than varieties of the parents. These hybrids are stronger and more rapid in growth than the common pear and are more productive and more resistant to blight. The pears are more pyriform and of much better flavor than those of the oriental parent. The calyx of hybrid fruits is sometimes persistent and sometimes deciduous. The hybrids do not make good stocks and intergraft but poorly with the common pear. Of all pear-trees, these are handsomest in growth when in perfect health and make excellent ornamental trees. The strong, clean growth, luxuriant green foliage, beautifully tinted in the autumn, resembles the oriental rather than the occidental parent. It is doubtful whether hybrid trees will attain the great size of those of the common pear, and they seem to succumb to the ills of old age rather more quickly than those of the European parent. The hybrid pears seem less well liked by the pestiferous San Jose scale than the common pear. The first flush of popularity having passed, hybrid pears have found their proper place in American pomology. They belong to the South and Middle West where the common pear is illy adapted to the climate. In the North and on the Pacific slope, pear-growers are wisely planting varieties the fruits of which are better in quality.
5. PYRUS USSURIENSIS Maximowicz
1. P. ussuriensis Maximowicz Bull. Acad. Sci. St. Petersb. 15:132. 1857.
2. P. sinensis Decaisne Bull. Acad. Sci. St. Petersb. 19:172. 1883.
3. P. simonii Carrière Rev. Hort. 28. 1872. fig. 3.
4. P. sinensis ussuriensis Makino Tokyo Bot. Mag. 22:69. 1908.