摘 要 ：Af finis C. hemsleyanae Franch. et Prain, sed caulibus scapiformibus, flori-lus flavis, majoribus, petalo antico basi saccato facile differt. Herba caespitosa circ. 30 cm longa. Rhizoma circ. 5-10 mm longum, 10 mm crassum, radicibus fibrosis, numerosis, fasciculatis. Caulis 1 usque numerosus, scapiformis, simplex, efoliolatus, interdum basi unifoliatus. Folia basalia numerosa, circ. 20 cm longa, petiolis circ. 15 cm longis basi marginato-expansis, plus minu-sve carnosulis, in sicco purpureo-brunneis, laminis circ. 5 cm longis 5-6 cm latis viridibus, subtus glaucescentibus, biternatis, pinnis brevipetiolulatis, pinnulis sessilibus vel subsessilibus, 2.5-3.5 cm longis, 2 - 3 cm latis bitripartitis, segmentis lanccolatis, saepe trilobatis.
Abstract:In this paper,Psammosilene tunicoides,an endemic species to China,was cytologically studied for the first time.The morphology of the nuclei at resting stage was categorized to be simple chromocentre type.The morphology of mitoticprophase chromosomes was categorized to be the interstitial type.28 chromosomes were observed at the mitotic metaphase,and 14 bivalent chromosomes were observed at diakinesis.So,the basic chromosome number was confirmed to be x=14.Psammosilene tunicoides is different from Silene rubicunda in the basic chromosome number and the morphology of the nuclei at resting stage and mitoticprophase chromosomes,because Silene rubicund has the basic chromosome number of x=10 and 12,and its nuclei at resting stage and mitoticprophase chromosomes is sparsely diffuse type and continuous type respectivrly.