Gahnia

Abstract: Wilson, K. L. (National Herbarium of New South Wales, Royal Botanic Gardens, Sydney, Australia 2000) 1980. Notes on some Australian species of Cyperaceae. Telopea 1 (6): 457-467, Pl. XXVI-XXVII.-The following new species are described: Baumea johnsonii, Bulbostylis burbidgeae, Cyperus portae-tartari and C. viscidulus. Gahnia australis (Nees) K. L. Wilson and G. drummondij (Steud.) K. L. Wilson are published as new combinations and a key provided to Gahnia section Microstachyae. Cyperus lhotskyanus Boeck. is reinstated, and Lepidosperma exsul C. B. Clarke is relegated to synonymy under Tricostularia neesii Lehm. Cyperus compactus Retz. is recorded as new for Australia. A key is provided to the Australian species of Bulbostylis, and B. eustachii J. M. Black ex C. M. Eardley is synonymized under B. barbata (Rottb.) C. B. Clarke. INTRODUCTION Recent collecting in Australia, particularly in the more remote northern areas, has provided material of new species and of little-known species of Cyperaceae. In this paper, four new species are described and the synonymies of various other species are discussed. Since recent revisions exist for all but one of the genera dealt with here (Bulbostylis being the exception), discussion is brief. Of the revised genera, Kiikenthal published revisions of Cyperus (1935-36), of Lepidosperma (1941 a & b), of Baumea (1942) as a subgenus of Cladium, of Gahnia (1943) and of Tricostularia (1944). Gahnia had previously been revised by Benl (1940). The work reported in this paper was begun at the National Herbarium of New South Wales and was completed after visits in 1977 to the Royal Botanic Gardens, Kew, to the British Museum (Natural History), to the Royal Botanic Gardens, Edinburgh, and to the Laboratoire de Phanerogamie, Paris. Unless otherwise indicated, all specimens cited have been seen by the author. BAUMEA Gaudich. Baumea has been variously regarded as a subgenus of Cladium (Kiikenthal, 1942), as a synonym of Machaerina (Kern, 1974; Vanhecke, 1974) and as a separate genus (Blake, 1969; Raynal, 1972). I am following Blake and Raynal in retaining Baumea as a separate genus. Baumea johnsonii K. L. Wilson, sp. nov. habitu et inflorescentia B. gunnii (Hook. f.) S. T. Blake et affinibus similis et nullo dubio his speciebus proxima, praecipue culmis foliisque scabridis differt. ROLOTYPE: NEW SOUTH WALES: Central Tablelands: Govetts Leap, Blackheath, E. F. Constable 5576A, 10.xii.1964 (NSW). ISOTYPES: BRI, CANB, CRR, K, P. Caespitose perennial. Culms erect, more or less terete to biconvex, scabrous, without nodes, 15-60 cm tall, 1-2 mm diam. Leaves basal, equitant, flattened above, to 150 cm tall, 2-3 mm wide, somewhat softto tough-textured, scabrous, shorter than to greatly exceeding culm and inflorescence; sheaths reddish; lowest leaves reduced to sheaths. Inflorescence-bracts reddish, flat, much shorter than lowest branch of inflorescence. Inflorescence paniculiform, (10-) 15-55 cm long, with (10-) 20-35 spikelets; branches slender, somewhat arching, sulcate, ± scabrous; rhachis elongated between lowest and upper branches, sulcate, scabrous, (5-) 10-38 cm long. Spikelets 6-8 mm long, solitary, with 1 fertile flower, glumes Volume 1(6): 457–467 Publication Date: March 1980 dx.doi.org/10.7751/telopea19803607 TELOPEA Journal of Plant Systematics Til. Ro)'al BOTANIC GARDENS 6 DOPII(liPi Tmst plantnet.rbgsyd.nsw.gov.au/Telopea • escholarship.usyd.edu.au/journals/index.php/TEL· ISSN 0312-9764 (Print) • ISSN 2200-4025 (Online)

Abstract: 'Hesperilla crypsargyra binna' subsp n is described and figured from an isolated population within the Lamington National Park in southern Queensland Characters are given to enable separation from the closely related but geographically isolated 'H c crypsargyra' (Meyrick) The new geographical arrangement together with examination of genitalia and other characters indicate that 'H hopsoni' Waterhouse stat n is specifically distinct from 'H crypsargyra' The immature stages of 'H c binna' are recorded on 'Gahnia insignis' ST Blake (Cyperaceae)

Abstract: According to the investigation of plants on the tailings of abandoned nonferrous mines in the Diaojiang basin of Guangxi , there are 26 families 58 genera 63 species of vascular bundle plant , which include 2 families 3 genera 3 species of fern and 24?families 55?genera 60 species of angiosperm. In these 63 species of plants, the arbor,shrub,semishrub,grass and liane share the percentage of 9.5,12.7,4.8,71.4 and 1.6 respectively. By analyzing the soil and plant samples, it is found that the soils contain a lot of heavy metals such as Cu, Cd , Pb, As, Sb, Zn, Sn, etc. Arundo donax, Neyraudia reynaudiana, Pteris vittata, Thysanolaena maxima and Gahnia tristis can accumulate Pb. The plants which can accumulate As are Neyraudia reynaudiana, Miscanthus floridulus, Pteris vittata, Cynodon dactylon, Gahnia tristis, Equisetum debile and Juncus effuses var. decipiens. Equisetum debile, Gahnia tristis, Miscanthus floridulus, Eremochloa ophiuroides, Pteris vittata, Imperate cylindrical, Chrysopogon aciculatus and Thysanolaena maxima can accumulate Zn. Neyraudia reynaudiana can accumulate Sn. The plants which can accumulate Sb are Neyraudia reynaudiana. The investigation of plants on the tailings of abandoned nonferrous mines in the Diaojiang basin of Guangxi indicates that many herbages, such as Araundo donax, Neyraudia reynaudiana, Miscanthus floridulus, Miscanthus sinensis, Imperate cylindrical, Chrysopogon aciculatus, Cynodon dactylon of Agrositidoideae, Gahnia tristis, Timbristylis sp of Cyperaceae, Bdens pilosa of Compositae, Pteris vittata of Pteridacdae and Equisetum debile of Equietaceaes, which can accumulate heavy metals and adapt to the atrocious conditions of the tailings, may be used as pioneer plants for vegetation restoration in abandoned nonferrous mines in Guangxi.