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Volume 55, 1924
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Cast., l.c.

Sphaeria Filum Biv.-Bern., Bernh. Stirp. rar Sic. Manip., vol. 3, p. 12, 1815. Phoma Filum Fr., Syst. Myc., vol. 2, p. 547, 1823.

Pycnidia superficial or immersed, scattered or gregarious, conicoglobose, elliptical, obovate, or depressed-globose, 90–120 × 60–100 mmm. diam., ostiolate, smooth, black. Conidia 1-septate, hyaline, fusoid, smooth, 10–18 × 3–6 mmm., slightly or not constricted at the septum, muticate.

Habitat: Parasitic upon the spores of the following species: Uromyces otakou G. H. Cunn. (II); U. Polygoni Fcl. (II); Uromycladium alpinum McAlp. (II); Urom. notabile McAlp. (II); Urom. Tepperianum (Sacc.) McAlp. (III); Puccinia Caricis Schroet. (II, III); P. Chrysanthemi Roze (II); P. Coprosmae Cke. (III); P. Elymi Westnd. (II); P. Hoheriae Wakef. (III); P. Hydrocotyles Cke. (II); P. juncophila Cke. et Mass. (II); P. Morrisoni McAlp. (II); P. Plagianthi McAlp. (III); P. Poarum Niels. (II); P. pulverulenta Grev. (II); P. punctata Link. (II); P. whakatipu G. H. Cunn. (II); P. Unciniarum Diet. et Neg. (II, III); Phragmidium novae-zelandiae G. H. Cunn. (I); Phr. Potentillae P. Karst. (I, II);

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Fig. 1.—Phragmidium Acaenae G. H. Cunn. Caeomata and teleutosori from Acaena microphylla Hook. f. Arrows point to the minute teleutosori.
Fig. 2.—Phragmidium norae-zelandiae G. H. Conn. Teleutosori from Acaena novae-zelandiae T. Kirk.
Fig. 3.—Phragmidium Potentillae P. Karst. Teleutosori on Acaena Sanguisorbae Vahl.
Fig. 4.—Hamaspora acutissima Syd. Teleutosori on Rubus australis Forst. f. Note the long and much-entwined fibrils. Arrow points to sori from which the fibrils have disappeared.
Fig. 5.—Milesina Histiopteridis G. H. Cunn. Uredosori on Histiopteris incisa (Thunb.) J. Sm. The white spots consist of numerous uredospores which have exuded from the immersed peridia.
Fig. 6.—Melampsora Lini Desmaz. Teleutosori on Linum monogynum Forst.
Fig. 7.—Aecidium Milleri G. H. Cunn. on Aristotelia serrata (Forst.) Oliver.
Fig. 8.—Aecidium Ranunculacearum DC. on Ranunculus Lyallii Hook. f.
Fig. 9.—Aecidium hupiro G. H. Cunn. on Coprosma foetidissima Forst.
Fig. 10.—Aecidium kowhai G. H. Cunn. on Edwardsia tetraptera (J. Mill.) Oliver. Photo by E. Bruce Levy.
Fig. 11.—Aecidium Myopori G. H. Cunn. on Myoporum laetum Forst. f.
Natural size. All photographs, with the exception of fig. 10, by the writer.

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Aecidium otagense Linds.; A. Ranunculacearum DC.; Uredo Dianellae Diet.; U. karetu G. H. Cunn.; U. Phormii G. H. Cunn.; U. Scirpi-nodosi McAlp.; U. toetoe G. H. Cunn.

Distribution: Europe; North and South America; Ceylon; Japan; Africa; Australia.

From the foregoing it will be seen that in New Zealand this species has been collected on aecidia, caeomata, uredosori, and teleutosori.

The mycelium ramifies through the sori and appears to plasmolyze and disintegrate those spores with which the hyphae come in contact; in certain sori, indeed, it is difficult to obtain any unaffected spores. Generally the pycnidia are superficial and easily seen, but in certain cases, particularly when they are parasitic upon aecidia, they are almost competely immersed, and their presence noted only when sections of the aecidia are examined. Saccardo (Syll. Fung., vol. 3, p. 410, 1884) states that the spores have on either end a few fine bristles; I have failed to observe these, although I have examined numerous microtome sections of pycnidia of all ages. So common are the pycnidia on certain species that they have frequently been mistaken for spermogones, and described as such.