Oryza officinalis complex includes five diploid species involving the B，C and E genomes，and is distributed in Asia，Africa and Oceania.These species are very importantbecauseO.australiensis is the only species with E genomewhileO.punctata is the single spe
Azolla Lam.is a small genus of free-floating ferns symbiotic with cyanobacteria.The heterogeneity of Azolla samples has been usually ignored when DNA was extracted from intact Azol-la-Anabaena complex for Azolla phylogeny analysis based on RAPD.In this st
Polyploidy has played an important role in the evolution of higher plants.In order to understand how polyploid genomes evolve after their formation，the Brassica triangle was used to study genomic evolution after the formation of polyploids.Random amplifie
Leaf epidermis of 37species representing 11 genera of Vitaceae was investigated using light microscopy（LM）and scanning electron microscopy（SEM）.The shapes of leaf epidermal cells are usually irregular or polygonal;the patterns of anticlinal walls are stra
Chromosome numbers of13species of Compositae from Hainan were coun
ted.Karyotypes of nine species were analysed.The results are as follows:Tithonia
diversifolia A.Gray，2n=34=26m+8sm（2sat）;Eclipta prostrata（L.）L.，2n=22=18m
+4sm;Synedrella nodiflora（L.）
Based on examination of the specimens of the genus Delphinium L.deposited in K，BM and GH，this paper is to further correct the misidentifications of the Chinese Delphinium made by P.A.Munz in his paper entitled“A synopsis of the Asian species of Delphiniu
Abstract Rhododendron liboense，a new species of the Ericaceae from Libo County，Guizhou，Chi-na，is described and illustrated.This species is related to R.huianum Fang in having inflorescence terminal，corolla pink，broadly campanulate，ovary densely white glan
Carex subcapitata X.F.Jin，C.Z.Zheng&B.Y.Ding，a new species of Cyperaceae from Zhejiang，China，is described and illustrated.It is related to C.grandiligulata K kenth.in having lateral culms，narrow leaves，spikelets androgynous，1-2arising from each node，but d
A new variety of Monochoria C. Presl from Thailand, M. vaginalis （N. L. Burman）Kunth var.angustifolia G. X. Wang， is described. This variety can be distinguished from the typical one, M. vaginalis var. vaginalis, by having mature leaves narrowly lanceolat
The earliest record of Cyrtosperma Griffith in China was made base
d on a collection from Hainan，W.T.Tsang553=L.U.16052.This collection was identi
fied as Cyrtosperma lasioides Griffith by E.D.Merrill and its duplicates were se
nt to different herbaria
The present record of the occurrence of Astomiopsis julacea （Besch.）Yip&S
nider（Musci）in Xizang，China， is based on misidentification
JIAYu WANGMei-Zhi WUPeng-Cheng
