Forelle is one of the most beautiful pears, its main claim to fame is the looks. The taste is also very good, not the best but still worth growing. Here is the Pears of New York description. Its interesting they say nothing about fireblight, they are usually mentioning that if its bad.
The pear fancier prizes Forelle for its singularly handsome and distinctive fruits, which are also of very good quality. Forelle pleases the eye, as well as any pear for bright colors, and is distinguished among fruits of its kind by its trout-like specklings from which comes the name Forelle, the German name for trout. Looks do not belie taste for the flesh is delicate and buttery, is highly flavored, and satisfies those who regard high quality a prime requisite in a pear. The trees are very satisfactory in warm soils and exposures, but fail in heavy clays and cold climates. The variety is worth growing for its beautiful and distinctive fruits.
Nothing is very certainly known of the origin of this pear, but it seems highly probable that it had its birth in northern Saxony at the beginning of the eighteenth century. From Germany it was taken to Flanders, and from there introduced into England. In the latter country, it was first fruited by Thomas Andrew Knight, President of the Horticultural Society of London, who, in 1823, sent cions to the Honorable John Lowell, President of the Massachusetts Horticultural Society. Forelle became quite widely disseminated in the eastern United States during the first half of the eighteenth century, and was considered by many pomologists a pear of merit. At the present time, however, the variety has almost disappeared from cultivation. Its place has been filled by Vermont Beauty, a pear introduced from Vermont more than forty years ago. It is not improbable that these two varieties are identical. Vermont Beauty may be the old German pear renamed.
Tree medium in size, vigorous, upright, very hardy and very productive; branches few, dark brownish-red, sprinkled with numerous lenticels; branchlets long, pubescent on the youngest shoots. Leaves small, flat, roundish-ovate; flowers open early.
Fruit ripens November to December; medium in size, 3 in. long, 2 in. wide, oblong-obovate-pyriform, with a neck variable in length; stem 1 in. long, slender; cavity shallow, oblique, narrow, often lipped; calyx small, open; lobes broad; basin shallow, narrow, abrupt; skin smooth; color yellow, more or less overlaid with red, deepening to rich crimson next to the sun, profusely covered with grayish-russet dots which are margined or rayed with crimson; dots numerous, large and small, russet or grayish; flesh white, fine-grained, although slightly granular at the center, melting, buttery, juicy, aromatic, with a rich, vinous flavor; quality good. Core medium in size; seeds nearly black, of medium size.