Abstract:

 Juncus Linn. is a cosmopolitan genus with about 240 species, widely distributed

in both hemispheres, but most abundant in the frigid and temperate zones.  In the present

paper, a revision of this genus in China is made, and a key to the species is provided. This

paper also presents a systematic arrangement of the genus Juncus Linn. from China, recog-

nizing six subgenera, 14 sections (includ. ten new), four series (includ. two new), 77

species (includ. 14 new), one subspecies (new) and ten varieties (includ. four new). They

are as follows:

Subgen. 1. Genuini Buchen.

      Sect. 1. Inflexi K. F. Wu, sect. nov.

      Sect. 2. Effusi (V. Krecz. et Gontsch. )K. F. Wu, stat. nov.

Subgen. 2. Pseudotenageia V. Krecz. et Gontsch.

      Sect.  1.  Kangpuenses K. F.  Wu, sect. nov.

      Sect. 2. Compressi (V. Krecz. et Gontsch. )K. F. Wu, stat. nov.

Sect. 3. Tenues (V. Krecz. etGontsch.)K. F. Wu, stat. nov.

Subgen. 3. Poiophylli Buchen.

      Sect.  1. Nigroviolacei K. F. Wu, sect. nov.

      Sect.  2. Bufonii (V. Krecz. et Gontsch. )K. F. Wu, stat. nov.

Subgen. 4. Graminifolii Buchen.

Subgen.  5. Septati Buchen.

      Sect. 1. Allioides K. F. Wu, sect. nov.

      Sect.  2.  Articulati K.  F.  Wu, sect.  nov.

           Ser. 1. Articulati V. Krecz. et Gontsch.

           Ser. 2. Dongchuanenses K. F. Wu, ser, nov.

Subgen.  6. Alpini Buchen.

     Sect.  1. Triglumes K. F. Wu, sect. nov.

           Ser.  1. Triglumes K. F. Wu, ser. nov.

           Ser. 2. Benghalenses K. F. Wu, ser. nov.

     Sect. 2. Minimi K. F. Wu, sect. nov.

     Sect.  3. Sikkimenses K. F. Wu, sect. nov.

     Sect. 4. Concinni K. F. Wu, sect. nov.

     Sect.  5. Sphacelati K. F. Wu, sect. nov.

Key words: Juncus Linn., taxonomy system