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采用形态描述及分子鉴定采自中国内蒙古自治区赤峰市赛罕乌拉自然保护区的群生标本,确定为中国乳菇属一新记录种(Lactarius scoticus)。主要鉴别特征是菌盖直径3.6 cm~6 cm,半球形,中部稍下凹,白色或污白色,表面光滑,中间色深,赭黄色或金黄色,边缘内卷并有绒毛;菌肉白色,受伤后变淡黄色,厚,具有轻微辣味,乳汁白色,不变色。菌褶白色、密、延生。菌柄白色,孢子无色,椭圆形,有小刺,大小(6~7.2)μm×(4.8~7.0)μm;担子棒状,(28.8~38.4)μm×(7.2~9.6)μm;褶侧囊状体近梭形,(28.8~53.2)μm×(6.7~8.4)μm;褶缘囊体与侧囊体形状相似。菌盖表皮由杂乱的菌丝组成,有丰富的乳管,菌丝无色有隔膜,直径4.3μm~7.2μm,菌盖表皮具囊状体,棒状,有隔膜,(48~67.2)μm×(12~14.4)μm。经分子鉴定,标本与Lactarius scoticus聚在一枝,属于乳菇属(Lactarius)辣乳菇亚属(Piperates)Aspideini组,支持率为76%。
The morphological characterization and molecular identification of the herbarium collected from the Saihanwula Nature Reserve in Chifeng City, Inner Mongolia Autonomous Region of China were identified as Lactarius scoticus. The main distinguishing feature is the cap diameter 3.6 cm ~ 6 cm, hemispherical, slightly concave central, white or dirty white, smooth surface, the middle of the color depth, ocher yellow or golden yellow, margin curled and fluffy; bacteria white meat, After the injury pale yellow, thick, with a slight spicy, milk white, does not change color. Pleurotus white, dense, extension of life. (6 ~ 7.2) μm × (4.8 ~ 7.0) μm; basal rod, (28.8 ~ 38.4) μm × (7.2 ~ 9.6) μm; pleated lateral parenchyma The shape of the body is nearly fusiform, (28.8 ~ 53.2) μm × (6.7 ~ 8.4) μm; the shape of the pleated edge capsule and the side capsule are similar. The epidermis is composed of disorganized hyphae and is rich in milk tube. The mycelium has a colorless membrane with a diameter of 4.3μm ~ 7.2μm. The cap epidermis has a cyst, a rod shape and a septum (48 ~ 67.2) μm × (12 ~ 14.4) μm. The molecular identification, the specimen and Lactarius scoticus gathered in a, belonging to Lactarius (Lactarius) Spicy Lactarius (Piperates) Aspideini group, the support rate of 76%.