The Shandong Scirpus Family Of Plant Morphology And Anatomy On The System Evolution

The family Cyperaceae is a recognized natural group, but the controversy has been in systematic treatment of the tribe Scirpeae. The comtroversy are as follows:1. Obscure limitation of the tribe Scirpeae, some scholars suggest including 5 genuses, the others propose 17 genuses; 2. Treatment of the genera and sections of the tribe Scirpeae; 3. Sysmatic position of some species and infra-species group, so further research needs to be done to sysmatic and taxonomy of the tribe Scirpeae.Supported by some related funds, the field investigating and collecting work had been done according to our study plan, we collected more than800 specimens containing about30 species of the tribe Scirpeae. Later we studied more than 200 specimens containing about 10 species of the tribe Scirpeae in PE, these work provided a solid foundation for our following research.The experiment on the morphological anatomy, the leaf epidermis, pollen grains, scale micro-morphology, achene micro-morphology were done under Optical microscope and SEM. The results provided new evideneces for systematic revision of the tribe Scirpeae from Shandong. The main research contents are as follows:1.Limitation of the tribe Scirpeae Basing on the classification system of Flora of Shandong and referring to FRPS vol.11 and FOC[draft](2009), it was clear that the genus Scirpus should be divided into 3 small genera, and they are Bolboschoenus (Ascherson) Palla, Scirpus L. and Schoenoplectus (Rchb.) Palla according to the morphological anatomy, the leaf epidermis, pollen grains, scale micro-morphology, achene micro-morphology; the results didn't support Bolboschoenus (Ascherson) Palla, Scirpus L. and Actinoscirpus R.W. Haines & Lye,Schoenoplectus (Rchb.) Palla and Pseudoschoenus in forming the tribe Fuireneae; the pollen morphological evidence didn't support Eleocharis R. Br. belonging to the tribe Eleocharideae, also Fimbristylis Vahl.and Bulbostylis Kuth were put into the tribe Abildgaardieae; achene micro-morphology indicated that Rhynchospora Vahl and Lipocarpha R. Br. should not be put into the tribe Scirpeae Kunth. The result indicated that the tribe Scirpeae from Shandong should include 7 genera, viz Bolboschoenus (Ascherson) Palla, Scirpus L., Schoenoplectus (Rchb.) Palla, Fuirena Rottb., Eleocharis R.Br., Bulbostylis Kuth and Fimbristylis Vahl.2. Classification system of tribe Scirpeae from Shandong Tribe Scirpeae KunthGenus Bolboschoenus(Ascherson)PallaGenus Scirpus L.Genus Schoenoplectus(Rchb.) Palla Sect. Ehrenbergii F.Z.Li et L.N.Liu section.nov. Sect. Validus F.Z.Li et L.N.Liu,section.nov. Sect. Schoenoplectus Reichb. Sect. Actaeogeton Reichb.Genus Fuirena Rottb.Genus Eleocharis R.Br. Sect. Limnochloa (Nees) Benth. Sect. Eeleocharis Ser. Aciculares C.B.Clarke Ser. Multicaules Svens Ser. Leiocarpae C.B.Clarke Ser. Maculosae Svens Ser. Palustriformes SvensGenus Bulbostylis KunthGenus Fimbristylis Vahl Sect. Trichelostylis (Lest.) Benth. Ser. Complanatae Tang et Wang Ser. Miliacea Ohwi Sect. Dichelostylis Benth. Ser. Dichotamae Ohwi Ser. Ferrugineae Tang et Wang Ser. Hookeriana Tang et Wang Ser. Schoenoides Tang et Wang Ser. Pogonostylis Tang et Wang Ser. Bisumbellata Tang et Wang Sect. Echinolytrum(Desv.) Y. T. Hou & Y. F. Chen, comb. nov.. The treatment on controversy species of the tribe Scirpeae from Shandong(1) The author combined Scirpus rongchengensis F. Z. Li into S. lushanensis Ohwi, and treated as a synonym of it.(2) F. complanata (Retz.)Link var. kraussiana C.B.Clarke should be rehatilitated to species rank F. kraussiana Hachst et Steud.(3) The evidences also support Sect. Ehrenbergii F. Z. Li et L. N. Liu and Sect. Validus F. Z. Li et L. N. Liu.4. New recorded species and varieties in Shandong4 species and 2 varieties newly recorded to Shandong were reported in sysmatic study on the tribe Scirpeae from Shandong, and the papers were accepted and would be published on related journals soon. They are Scirpus juncoides Roxb. var. hotarui (Ohwi) Ohwi., Eleocharis attenuata (Franch. et Savat.) Palla, Fimbristylis hookeriana Bocklr., Cyperus tenuispica Steud., Pycreus polystachyus (Rottb.) P. Beauv var. brevispiculatus How and Fimbristylis diphylloides Makino.