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Lactarius vinaceorufescens : ウィキペディア英語版 | Lactarius vinaceorufescens
''Lactarius vinaceorufescens'', commonly known as the yellow-staining milkcap or the yellow-latex milky, is a poisonous species of fungus in the Russulaceae family. It produces mushrooms with pinkish-cinnamon caps up to wide held by pinkish-white stems up to long. The closely spaced whitish to pinkish buff gills develop wine-red spots in age. When it is cut or injured, the mushroom oozes a white latex that rapidly turns bright sulfur-yellow. The species, common and widely distributed in North America, grows in the ground in association with conifer trees. There are several other ''Lactarius'' species that bear resemblance to ''L. vinaceorufescens'', but most can be distinguished by differences in staining reactions, macroscopic characteristics, or habitat. ==Taxonomy and classification== The species was first described by American mycologists Lexemuel Ray Hesler and Alexander H. Smith in 1960, based on specimens collected in Muskegon, Michigan in 1936. In the same publication, they also named the variety ''Lactarius vinaceorufescens'' var. ''fallax'' to account for individuals with prominently projecting pleurocystidia measuring 9–12 µm broad,〔 but they reduced this to synonymy with the main species in their 1979 monograph of North American ''Lactarius'' species.〔Hesler and Smith (1979), pp. 317–19.〕 The fungus is classified in the subsection ''Croceini'' of the subgenus ''Piperates'' in the genus ''Lactarius'', along with other species with latex that stains the fruit body tissue yellow, or with latex that slowly become yellow upon exposure to air.〔Hesler and Smith (1979), pp. 304–5.〕 The specific epithet ''vinaceorufescens'' is derived from the Latin word meaning "becoming wine reddish".〔 The mushroom is commonly known as the "yellow-latex milky"〔 or the "yellow-staining milkcap".〔
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