Variation patterns of main taxonomic characters of Berberis sublevis W.W.Smith were investigated by field population sampling in Tengchong County,Yunnan Province,Southwest China,in combination with laboratory observations,checking type specimens,and statistical analysis.The research results are shown as below.(1)The leaves were 1.95-12.91 cm long,mean±SD=5.54±2.15 cm,and 0.45-1.94 cm wide,mean±SD=0.97±0.32 cm.Number of flowers per flower fascicle was 2-14,mean±SD=5.1±2.2.Flowers yellow,with 13-20 tepals per flower,mean±SD=15.36±1.34.The tepals with 2 nectaries narrowly obovate to broadly obovate,apexes usually emarginate to notched,occasionally entire,3.18-5.94 mm long,mean±SD=4.82±0.52 mm,and 1.45-4.41 mm wide,mean±SD=2.65±0.54 mm.(2)All the ovaries and fruits contained only one ovule or just one seed.Berries ellipsoid to ovate ellipsoid,purplish black,3.37-8.36 mm long,mean±SD=6.91±0.82 mm,and 2.85-5.13 mm wide,mean±SD=4.02±0.46 mm.Length of the fruit stalks was 0.47-2.20 cm,mean±SD=1.10±0.32 cm.(3)Among the coefficients of variation,number of flowers per flower fascicle (0.37)＞length of leaves(0.21)＞width of leaves(0.18)＞length of fruit stalks(0.17)＞width of nectariferous tepals(0.14 )＞length of nectariferous tepals(0.08)=tepal number per flower(0.08)＞length of fruits(0.07)= width of fruits(0.07).(4)Several photos of leaves,flowers and fruits are provided to fill the gap of illustration absence of B.sublevis in Flora of China.Furthermore,the effects of habitat conditions on the morphological variations between populations of B.sublevis,and its relationships with a sympatric congener,B.replicata are also discussed.