. Transactions and proceedings and report of the Philosophical Society of Adelaide, South Australia. esent a very different flora. It is as members of the geophytic element in this seasonalswamp on alluvial sands that Isoetes and Phyllo gloss innoccur. Isoetes appears to have a wider range, but in allother stations known at present it is a geophyte on alluvialsandy soil, only isolated plants being actually submergedduring the growing season. Isoetes (fig. 3) agrees with manyof its cogeners in general size and approximate depth to whichthe stock is buried. Phylloglossum is a much smaller plantt
. Transactions and proceedings and report of the Philosophical Society of Adelaide, South Australia. esent a very different flora. It is as members of the geophytic element in this seasonalswamp on alluvial sands that Isoetes and Phyllo gloss innoccur. Isoetes appears to have a wider range, but in allother stations known at present it is a geophyte on alluvialsandy soil, only isolated plants being actually submergedduring the growing season. Isoetes (fig. 3) agrees with manyof its cogeners in general size and approximate depth to whichthe stock is buried. Phylloglossum is a much smaller plantthan the other geophytes, for which reason Diels perhaps wasled to class it with the ephemerals. It is, however, notephemeral, but typically geophilous in its growth. Itsannual tuber, sunken by a stalk to a constant average depth,is functionally comparable with the many other tubers, etc.,developed by its geophytic neighbours, from which Phyllo-glossum differs so markedly in size. Summary. 1. Isoetes Drummondii and Phylloglossum Drummondiiare recorded for the first time from South Australia, thus. I 12 completing the range of the latter species along southernAustralia. 2. A description is given of the association in whichIsoetes and Phylloglossum occur together. It is regarded as aseasonal swamp developed upon alluvial soil within the forma-tion of sclerophyllous woodland. 3. In South Australia both genera are members of aconsiderable geophilous element within this association. Literature Cited. 1. BenthaM, G. : Flora Australiensis, 1878, vol. vii., p. 672. 2. Bertrand, C. E. : Arch. Bot. du de la France, 1884. 3. Bower, F. O. : Phil. Trans. Boy. Soc. London, 1886, vol. 176. 4. Cheeseman, T. F. : Manual of the New Zealand Flora, 1906, p. 1032. 5. Diels, L. : Die Pflanzenwelt von West Australien, 1906, p. 256. 6. E wart, A. J., and Rees, B. : Proc. Roy. Soc. 1913, vol., 26, p. 5. ; 7. Maiden, J. and BETCHEj E. A Census of New, South Wales Plants, 1916. 8. Mueller, F.
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