AN UNDESCEIBED SPECIES OF USTILAGO ON CYFERUSLUCIDUS E.Br. IN AUSTEALIA With comments on Eobert Brown's type collection of C. lucidus J. Walker Biology Branch, Biological and Chemical Research Institute, N.H.W. Department of Agriculture, Rydalmere, N.S.W. (Plates X, XI) [Accepted for publication 17th February 1971] Synopsis An ovary smut of Cyperus lucidus R. Br. found in New South Wales is described as Ustilago cyperi-lucidi n. sp. It was also found in one collection of C. lucidus from Queensland and one from Victoria. Examination of two portions of Robert Brown's original gathering of C. lucidus, made in N.S.W. in 1802-1805, showed that the smut was present in the portion filed in the Herbarium, Royal Botanic Gardens, Kew, but not in the lectotype specimen in the British Museum (Natm-al History). The relationship of U. cyperi-lucidi to other species with pale spores, and especially to Ustilago spp. on Cyperaceae and Juncaceae, is discussed. Introduction During an examination of collections of Cyperus spp. at the National Herbarium of New South Wales, Mr. O. D. Evans found abnormal nuts in some collections of Cyperus lucidus E. Br. Detailed examination showed them to be fillpifl with a vellowish nowder comnosed of snoi^es of an hitherto unrecoffnized The Corrigenda iions P. 100.— ^or Plate IX, read Plate X. For Plate X, read Plate XI. P. 102.— ^or Plate X, read Plate XI. itiae P. 10?,.— For Plate X, read Plate XI. i^*^' P. 104.— ^or Plate X, read Plate XI. pi^^g P. 107.— ^or Plate IX, read Plate X. Una, For Plate X, read Plate XI. lata, oris, s et primitus 10-15 in fasciculis laxe adherentes, demum singulatim, interdum cum frustilhs affixis hypharum, (15) 16-22 (25) [j.m diam., spora gigantea rara ad 27 [Jim diam., vel sporae ovales 17-23 (25) x 12-17 \xm. (minus quam 10% sporarum), pallide viridi-flavae usque pallide flavobrunneae, pariete 1-5-2-0 [xm lato, episporio subtiliter reticulato vel imperf ecte reticulato, reticulum 1 • 5-2 • [xm altum, areolis 1 -5-2 -0 (2-5) \im diam. Sporae in solano glucoso agaro ad 15-21° C. in diem per promycelium 3-septatum 26-33x5-9 fxm germinantes et sporidia ovalia 7-10 x 4-6 ^m a omni cellula formata. Habitat : In acheniis Cyperi lucidi in Nova Wallia Australi, Victoria et Terra Eeginae, Australia. Holotypus : In pasture, property of E. Skellern, Wyndham, west of Pambula. N.S.W., ll.vii.l969, J. Hindle, DAE 17587a. Proceedings of the Linnean Society of New South Wales, Voj,. 96, Part 'J
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