Unlike introduced crabapples, pears do not seem to have escaped as often in Wisconsin. The Callery pear (P. calleryana Decne.) is said to have escaped in Milwaukee and Waukesha but no specimens have been made to corroborate this. It differs from P. communis in having pubescent winter buds, 2–3 styles, deciduous calyx lobes, and fruits 6–11 mm in diameter. The leaves of P. calleryana are ovate to broadly ovate or oblong-lanceolate while those of P. communis are ovate to suborbiculate to elliptic, although the difference is not always apparent.