KARYOTYPE ANALYSIS OF TWO NEW SPECIES ON PARIS L. Yield Ecology Simulation and Information Parameter Application of Leymus chinensis Grassland in Northeast China During Growing Season Variation of Endogenous Hormone Contents in Bulbs of Two Lycoris During Growth and Development KARYOTYPE ANALYSES IN PLATYCLADUS ORIENTALIS AND F0KIENIA H0DGINSII KARYOTYPE ANALYSES IN LYCORIS ANHWEIENSIS AND L. CHINENSIS