Sphaerotylos C. J. Chen—A Remarkable New Genus of Urticaceae from China,with Notes on Stigmas of the Family

A new subtribe of the family Urticaceae, Sphaerotylinae C. J. Chen, a new genus, Sphaerotylos C. J. Chen and its type species S. medogensis C. J. Chen from south-eastern Xizang (Tibet) in China are described and illustrated. The subtribe is regarded as a primitive group in the tribe Boehmerieae. The ring-shaped stigma and the ball-like connective are the first discovery in the family Urticaceae. The types of the stigma of the family, their taxonomic significance and their evolution are also discussed in the present paper.     

兰科11属14种植物核型分析

采用染色体压片技术对兰科（Orchidaceae）11属14种植物进行染色体数目和核型研究。结果如下：短序脆兰（Acampe papillosa）2n=2x=36m＋2sm;多花脆兰（Acampe rigida）2n=2x=32m＋6sm;窄唇蜘蛛兰（Arachnis labrosa）2n=2x=34m＋4sm;广东隔距兰（Cleisostoma simondii vat．guangdongense）2n=2x=32m＋6sm;五唇兰（Doritis pulctwrima）2n=2x=30m＋8sm;镰叶盆距兰（Gastrochilus acinacifolius）2n=2x=38m;盆距兰（Gastrochilus calceolaris）2n：2x=38m;无茎盆距兰（Gastrochilus obliquus）2n=2x=38m;白唇槽舌兰（Holcoglossum sbulifolium）2n=2x=38m;大尖囊兰（Kingidium deliciosum）2n=2x=30m＋8sm;钗子股（Luisia morsei）2n=2x=24m＋12sm＋2st;鹿角兰（Pomatocalpa spicatum）2n=2x=36m＋2sm;海南钻喙兰（Rhynchostylis gigantea）2n=2x=36m＋2sm;大叶寄树兰（Robiquetia spathulata）2n=2x=36m＋2sm。根据研究结果,对芝科植物的系统与进化进行了简要讨论。     

关于兰科若干亚族的分类问题

本文对兰科中9个亚族的分类问题进行了探讨,并发表了5个新亚族：宽距兰亚族Subtrib Yoaniinae、肉药兰亚族Subtrib．Sterosandrinae、紫茎兰亚族Subtrib．Risleyinae、坛花兰亚族Subtrib．A- canthephippiinae和筒瓣兰亚族Subtrib．Anthegoiinae。     

山东莴苣亚族植物的修订

对山东现有的莴苣亚族的植物标本进行了研究,确定山东莴苣亚族植物有24种,分属于12个属,即：苦苣菜属(Sonchus L.)、乳苣属(mulgedium Cass.)、山柳菊属(Hieracium L.)、黄鹌菜属(Youngia Cass.)、福王草属(Prenanthes L.)、翅果菊属(Pterocypsela Shih)、莴苣属(Lactuca L.)、苦荬菜属(Ixeris Cass.)、小苦荬属(Ixeridium (A.Gray) Tzvel.)、沙苦荬属(Chorisis DC.)、黄瓜菜属(Paraixeris Nakai)和蒲公英属(Taraxacum L.)。发现1个新记录种：华蒲公英(Taraxacum borealisinense Kitam.)。