Albinism despite its lack of chlorophyll it may grow to substantial size as a parasite, usually on the base of the (normal) redwood tree from which it first grew. Only about sixty examples of albino redwoods are known. Additionally, an even smaller number of "chimeric" redwood trees have both normal and white needles. Albinism has frequently occurred in progeny of Black Tartarian, Bing and Hedelfingen varieties of sweet cherry. The Albino Squirrel Preservation Society was founded at the University of Texas at Austin in 2001. Members of the society at the University of North Texas petitioned for an election to name
Varieties of Chinese the tone categories of Middle Chinese, but in Shanghainese several of these have merged. Many Chinese varieties exhibit tone sandhi, in which the realization of a tone varies depending on the context of the syllable. For example, in Standard Chinese a third tone changes to a second tone when followed by another third tone. Particularly complex sandhi patterns are found in Wu dialects and coastal Min dialects. In Shanghainese, the tone of all syllables in a word is determined by the tone of the first, so that Shanghainese has word rather than syllable tone. Most morphemes in Chinese varieties are