CLASSIFICATION OF THE GENUS OUDEMAN SIELLA SPEC IN SOUTHWEST CHINA
我国西南小奥德蘑属的分类

Having examined a number of specimens of the genus Oudemansiella Speg. s.1., collected from southwest China (Yunnan, Guizhou, Sichuan, and Xizang), the authors consider that Pegler & Young's infrageneric treatments of the genus are more reasonable and acceptable than others'. 10 species and 4 varieties, belonging to 2 subgenera and 4 sections of their system, are reported forthe region, including 3 new species, one new variety and one new combination. The new taxa are OudemansielIa yunnanensis Z. L. Yang et Zang, Oudemansiella mucida (Schrad.: Fr.) v. Hoehn. var. pseudorhiza Z. L. Yang et Zang, Oudemansiella velata Z. L. Yang et Zang, and Oudemansiella amygdalitormis Z. L. Yang et Zang. Oudemansiella radicata (Relh.: Fr.) Singer var. bispora (Redhead, Ginns et Shoemaker) Z. L. Yang et Zang is the new combination. The new taxa are described in Latin as well as in Chinese, and illustrated with line drawings. All specimens cited are deposited in HKAS (Cryptogamic Herbarium, Kunming Institute of Botany, Academia Sinica). According to the present knowledge of the genus, about one-third of the total species in the genus, and 4 sections out of the five, excluding sect. Dactylosporina, are distributed in the region, indicating that Southwest China is rich in species and sections of Oudemansiella. Floristically, boreal elements are predominant, while tropical ones are represented by only one or two species. O. yunnanensis and O. velata may be characteristic, younger taxa, gradually evoluted during the uplift of the Himalayas, the formation of the Hengduan Mts., and the rise of the Yunnan-Guizhou Plateau.