Karyotypes of 12 Species of Paphiopedilum subgenus Paphiopedilum
兜兰亚属12种植物的核型分析

Karyotypes of 12 species of Paphiopedilum subgenus Paphiopedilum were studied by root tips squash method.The results showed that the chromosome number and karyotype were different among these species.Their formulae were as follows: P.philippinense for 2n=2x=26=16m+10sm,P.dithanum for 2n=2x=26=20m+6sm,P.densissimum for 2n=2x=26=22m+4sm,P.parishii and P.hirsutissimum for 2n=2x=26=24m+2sm,P.henryanum,P.markianum and P.rhizomatosum for 2n=2x=26=26m,P.callosum for 2n=2x=32=2M+24m+6sm,P.microchilum for 2n=2x=38=2...