Clematis sect. Clematis is revised in this paper. Seventy-three species and 45 varieties are recognized. They are keyed, described, and illustrated in some cases, and are classified into five subsections. Brief taxonomic history and geographical distribut
The subgenus Azaleastrum Planch. of Rhododendron L. (Ericaceae) was
traditionally divided into two sections, i.e. sect. Azaleastrum (Planch.) Maxim.
and sect. Choniastrum Planch. The internal transcribed spacer (ITS) regions of
nuclear ribosomal DNA
Pollen grains and seed surface features of the four species in the genus Dactylicapnos Wall. (Papaveraceae) from China were studied under light mi cros cope (LM) and scanning electron microscope (SEM). Pollen grains are usually subs pheroidal in shape, an
A taxonomic study is made on the genus Leptolepidium K. H. Shing et S. K. Wu （Sinopteridaceae） on the basis of field work and specimen examination. Two species （L. caesium (Christ) K. H. Shing et S. K. Wu and L. tenellum Ching et S. K. Wu） and two va
Rhododendron longesquamatum var. glabristylum Y. Y. Geng et Z. L. Zhao , a new variety of the Ericaceae from Sichuan, China, is described and illustrat ed. This variety is different from the typical one by having smaller leaves (5～8×2～3.5 cm) and smalle
The historical development of the concepts of genealogy, phylogeny, mo nophyly and polyphyly is briefly reviewed. The different implications of the tw o most controversial terms in taxonomic and evolutionary literature, “monophyly " and “polyphyly", are
