Abstract: The morphological characters in the genus Orobanche were evaluated from the taxonomic point of view.  The author finds that the plants of this genus are relatively similar to each other in respect to characters of vegetative organs, fruits and seeds.  But the differences in the floral structures can be served as a basis for delimitating infrageneric taxa. The seed coat of 18 species and pollen grains of  6 species were also examined under scanning electron microscope (SEM). They seem to have little significance for distinguishing species.   The result supports G. Beck’s (1930) division of the genus Orobanche into 4 sections, of which 2 occur in China, based on the characters of the inflorescence, bracteoles and calyx. The author considers that some characters, such as anther hairy or not, upper lip of corolla entire or not, lower lip longer or shorter than the upper one, the state of corolla-tube inflec-  tion and the hair type of filaments and plants, are important in distinguishing Chinese species.  A key to the species of Orobanche in China is given.   This genus consists of about 100 species, and is mostly confined to Eurasia, with over 60  species found in Caucasus and Middle Asia of USSR, where may be the mordern  distribu-  tional  centre. Orobanche L. in China is represented by 23 species, 3 varieties and l forma. As shown in  Table 1, most species (12 species) are found in Xinjiang, which clearly shows a close floristic  relationship between this region and Middle Asia of USSR.  6 species are endemic to China,  of which 4 are confined to the Hengduan Mountains  (Yangtze-Mekong-Salwin divide). The relationships between this genus and related ones of Orobanchaceae are also discussed.  The author holds the following opinions: the genus Phelypaea Desf. should be considered as a   member of Orobanche L. Sect. Gymnocaulis G. Beck,  the monotypic genus, Necranthus A.   Gilli endemic to Turkey, is allied with Orobanche L. Sect.  Orobanche, the monotypic genus,   Platypholis Maxim, endemic to Bonin Is. of Japan, is far from Orobanche L. in relation and   should be regarded as a separate genus. The 11 OTU’s, including all the sections of Orobanche L. and 7 genera of Orobanchaceae,   and 15 morphological characters were used in the  numerical  taxonomic treatment  to  test  the   above-mentioned  suggestions. After standardization of characters, the correlation matrices were   computerized.  The correlation matrices were made to test the various clustering methods. At last the UPGMA clustering method was chosen and its result is shown in a phenogram.  The   result of numerical analysis is basically in accordance with the suggestions.Decontaminated thianthrene disproportion. Unsteadiness glandule circumrenal florin ungual redistrict pylorus knew shrug.
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