Excluded or Doubtful 'Species. 209 



These spores are exceedingly numerous, and very variable in size and shape. 

 They are hyaline individually, although oehraceous in the mass and finely 

 granular. They vary from elliptic to ovoid or pear-shaped, and are 

 occasionally slightly curved. There is a clear central axis to the spore, and 

 it is generally broken in the centre, or may be several times transversely 

 divided. Their average size is 24-32 x 9-10 p. They are usually borne on 

 short hyaline filaments, and occasionally a long filament is adherent to a 

 detached spore. 



There is nothing in the appearance or nature of this fungus to indi- 

 cate that it is a Uredine ; it rather suggests some form of Hyphomycete. 



15. Aecidium apocyni Schwein. The specimen referred by Cooke to 

 this species is Caeoma apocyni. 



16. Aecidium barbareae DC. The Cruciferous host-plant is not a 

 Harbarea, and a portion of the original specimen shows teleutosori as well as 

 aecidia. I have named the rust Puccinia cruciferae. 



17. Aecidium bellidis Thuem., was determined by Cooke on Bellis 

 perennis from Victoria. This is considered to represent the aecidial stage 

 of Puccinia obscura Schroet. which occurs on Luzula, but since teleuto- 

 spores have been found from year to year on Victorian specimens along 

 with the aecidia, it is evidently quite a distinct species. I have, therefore, 

 named it Puccinia distincta. 



Mr. Cheeseman, one of our leading nurserymen, informs me that the 

 seeds of Bellis perennis are imported from England and Germany, mostly 

 from the latter country. He also states that some have had to give up 

 growing the plants on account of the rust (Puccinia distincta), since it 

 attacks the youngest seedlings sometimes, and at other times the plants 

 remain healthy till late in spring and then become badly attacked. One 

 would naturally conclude that the rust had been imported with the seed, but 

 it is strange that no teleutospores have been found accompanying the aecidia 

 in the countries named. Although I have provisionally recorded it as a 

 native rust, the probabilities are that it will be found to exist in the 

 countries from which the seed has been derived. 



18. Aecidium COmpOSitarum Mart. All the species occurring on 

 Compositae have been distributed among their respective host-plants. 



19. Aecidium plantaginis Ces. The species on the native Plantago 

 varia is distinct from this, the spores being echinulate instead of 

 tuberculate, and considerably larger. It has been named A. plantaginis variae. 



20. Aecidium senecionis Desm. This has also been determined in the 

 absence of complete specimens, but since the teleutospores have been found 

 associated with the aecidia, it has been determined as a new species by 

 Dietel, and named P. tasmanica. It is a striking fact that on three such 

 common imported plants as the garden daisy, Bellis perennis, groundsel, 

 Senecio vulgaris, and marigold, Calendula officinalis, there should have been 

 new species of Purcinia discovered. As regards the grcrundsel, aecidia have 

 been found on native species of Senecio, probably belonging to the same rust. 



21. Aecidium violae Schum., is also recorded, but this belongs to P. 

 violae, and is therefore excluded. 



22. Uredo Cichoracearum DC. originally determined by Dr. Cooke 

 on Jtidi'-n* piloMi is now found to be U. bidentis P. Henn. 



23. Uredo leguminum Desm. This species originally occurred on 

 Phaseolus, and is recorded by Cooke as being found on pods of Acacia in 

 Queensland, but since there is every reason to believe that the rust on a bean 

 is distinct from that on a wattle it is excluded from the list. Probably it is 

 a stage of a Uromycladium, 



