北京植物区系新资料

SOME NEWLY RECORDED FLORA PLANTS FROM BEIJING

报道了北京植物区系新记录共12种,它们是三白草(Saururus chinensis(Lour.)Baill.)、木防己(Cocculus orbiculatus(L.)DC.)、土荆芥(Chenopodium ambrosioides L.)、铺地藜(Chpumilio R.Br.)、夜香紫茉莉(Mirabilis nyctaginea(Michx.)MacMill.)、水盾草(Cabomba caroliniana A.Gray)、白英(Solanum lyratum Thunb.)、腺龙葵(S sarrachiodes Sendtner.)、毛酸浆(Physalis pubescens L.)、天名精(Carpesium abrotanoides L.)、长喙婆罗门参(Tragopogon dubius Scop.)、砖子苗(Mariscus umbellatus Vahl);此外,还补充了丝叶唐松草(Thalictrum foeniculaceum Bunge)和小花万寿菊(Tagetes minuta L.)在北京的新分布地点.除丝叶唐松草外,其余种均为归化物种.三白草科(Saururaceae)为北京新记录科,而三白草属(Saururus),木防已属(Cocculus),水盾草属(Cabomba),婆罗门参属(Tragopogon)和转子苗属(Mariscus)为北京新记录属.

Twelve （12） species are reported as new flora in Beijing in this paper. These species include Saururus chinensis （Lour.） Baill. , Cocculus orbiculatus （Linn.） DC. , Chenopodium ambrosioides L., Ch. pumilio R. Br. , Mirabilis nyctaginea （Michx.） MacMill. , Cabomba caroliniana A. Gray, Solanum lyratum Thunb. , S. sarrachoides Sendtner, Physalis pubescens L. , Carpesium abrotanoides L. , Tragopogon dubius Seop. , Mariscus umbellatus Vahl. Thalictrum foeniculaceum Bunge and Tagetes minuta L. are reported as supplementary distribution in Beijing area. Most of these species are naturalized except Thalictrum foeniculaceum Bunge. Saururus,Cocculus, Cabomba, Tragopogon and Mariscus are newly recorded genera, and Saururaceae is newly recorded family of Beijing flora.