Platygyria Ching&S.K.Wu is a unique genus in Polypodiaceae.The striking feature of the species in the genus is the unusually broad and vertical complete annulus consisting of cells with scarcely incrassate cell walls and indistinct stomium in the globose
The Athyriaceae are a large and complex family.The phylogenetic relationships among the genera in the family are not well understood，and the systematic positions of Neoathyrium crenulatoserrulatum，Kuniwatsukia，Pseudocystopteris，Diplaziopsis，Allantodia and
Cucumis hystrix is the first wild Cucumis species possessing12basic chromosomes ever found in Asia.This discovery has posed a challenge to the current subgeneric division of this genus which was made mainly based on the differences in basic chromosome num
Cladistic analysis of the morphological relationship of40populations of Paeonia sect.Moutan DC.（including all wild species）was carried out with an attempt to have a better understanding of the phylogeny of tree peonies.Twenty-five morphological characters
Eighteen types and nine subtypes of the seedlings in dicots are recognized based on a long-term investigation on the seedlings of1251species in740genera of157families.They are:1.Polyalthia Type;2.Euryale Type;3.Uvaria Type;4.Magnolia Type;5.Peperomia Type
A combination of dichogamy and herkogamy in hermaphroditic plants is an effective mechanism to encourage outcrossing and avoid selfing.In this paper，we studied whether such a mechanism completely avoids geitonogamous selfing in Swertia przewalskii Pissjau
Cryptogramma R.Br.from China is taxonomically revised.Two species and one variety are recognized，namely C.stelleri（Gm l.）Prantl，C.brunoniana Wall.ex Hook.&Grev.，and C.brunoniana var.sinensis（Christ）G.M.Zhang.C.emeiensis Ching&K.H.Shing is reduced to synon
A pair of vicarious species disjunctly distributed in western North America and Himalaya-central Asia，Epipactis gigantea Dougl.ex Hook.and E.royleana Lindl.，are illustrated and discussed taxonomically and phytogeographically.A distribution map is provided
Peliosanthes pachystachya W.H.Chen&Y.M.Shui，a new species of Liliaceae from L chun County，SE Yunnan，is described and illustrated.The new species is similar to P.sinica Wang&Tang in the stolon with internodes ca.18cm long，but different by leaves9-13-nerved
One subspecies and two species in the genus Rhododendron from Sich
uan，China，namely R.decorum Franch.ssp.cordatum Hu，R.xichangense Z.J.Zhao，and R.davidsonianum Rehd.&Wils.are reduced to synonymies.
Based on examination of herbarium specimens and field observations，Elatostema xinningense W.T.Wang is relegated to a variety of E.sinense H.Schr⒐ter，viz.E.sinense H.Schr⒐ter var.xinningense（W.T.Wang）L.D.Duan&Q.Lin.
