Observation on Chromosomes of Wildflowers in China
我国野生花卉的染色体观察

In this paper 7 species of wildflowers were collected from Beijing suburb and Jilin Province. They are all common sightly and hardy perennials in their localities (See the Appen- dix for detail of the materials). The micrographs of their somatic metaphases are shown in Pl- ate 1; the karyotype formulae, ranges of chromosome length and classification of karyotypes ac- cording to Stebbins (1971) are shown in Table 1; the idiograms of 5 species in Figs. 1-5. The karyotype analysis is made on the basis of Li and Chen (1985)(1). The essential points are as follows; (1) Ten pairs of chromosomes of Achyrophorus cilia- tus are all submetacentric (sm). (2) Twelve pairs of chromosomes are all metacentric (m), and the short arms of the seventh pair of chromosomes with a pair of satellites in Orychophragmus violaceus. (3) The seventh and nineth pairs of chromosomes are sm and the short arms of lat- ter with satellites in Silene repens var. angustifolia. It is reported for the first time. (4) In Sca- biosa tschiliensis. the first, fourth, fifth and eighth pairs of chromosomes are sm, the sixth is ter- minal (t). The second and seventh are subterminal (st), the third is m. There are satellites on the short arms of third and seventh pairs. It is reported for the first time. (5) The eleventh pair of chromosomes is sm and the others are all m. The short arms of the twelfth pairs with satel- lites in Lychnis fulgens. (6) The chromosome number (2n) is 42, with a pair of satellites in Pa- paver pseudo-radicatum. It is also reported for the first time. (7) The chromosome number is2n=56 with two pairs of satellites in Rehmannia glutinosa.